The circumference of a circle whose area is 9π cm² in terms of pi is 6π centimeters.
What is the circumference of the circle?A circle is simply a closed 2-dimensional curved shape with no corners or edges.
The area of a circle is expressed mathematically as;
A = πr²
The circumference of a circle is expressed mathematically as;
C = 2πr
Given that the area of the circle is 9πcm², we determine the radius of the circle.
A = πr²
9πcm² = π × r²
r² = 9πcm² / π
r² = 9cm²
r = √9cm²
r = 3cm
Now, we determine the circumference of the circle.
C = 2πr
C = 2 × π × 3cm
C = 6cm × π
C = 6π cm
Therefore, the circumference of the circle is 6π centimeters.
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a rectangular plot of ground is 30 meters longer than it is wide. Its area is 20,000 square meters. which equation will help you find the detentions?
The equation of the dimensions of the rectangular plot is W² + 30W - 20,000 = 0
How to find the dimensions of the plot of land?Let
L = length of rectangular plot of land, W = width of plot of rectangular plot landSince the rectangular plot of ground is 30 meters longer than it is wide, we have that
L = W + 30
Since the area of the rectangular plot is A = LW where
L = length of rectangular plot of land, W = width of plot of landSince A = 20,000 m², we have that
LW = 20,000
(W + 30)W = 20,000
W² + 30W = 20,000
W² + 30W - 20,000 = 0
Using the quadratic formula, we have that
[tex]W = \frac{-30 +/- \sqrt{30^{2} - 4 X (-20000)} }{2 X 1} \\W = \frac{-30 +/- \sqrt{900 + 80000} }{2} \\W = \frac{-30 +/- \sqrt{80900} }{2} \\W = \frac{-30 +/- 284.43}{2} \\W = \frac{-30 +/- 284.43}{2}\\W = \frac{-30 - 284.43}{2} or \frac{-30 + 284.43}{2}\\W = \frac{-314.43}{2} or \frac{254.43}{2}\\W = -157.22 or 127.23\\[/tex]
Since W cannot be negative, we have W = 127.23
Since L = W + 30
L = 127.23 + 30
L = 157.23
So, the dimensions are
Length = 157.23 mWidth = 127.23 mSo, the equation of the dimensions of the rectangular plot is W² + 30W - 20,000 = 0
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after cynthia microwaves her bowl of morning porridge, it is either too cold, just right, or too hot. she estimates that there is a 35\55, percent chance that it will be too cold and a 50\pp, percent chance that it will be too hot. what is the probability that cynthia's morning porridge will be just right?
The probability that Cynthia's morning porridge will be just right is 15%.
Probability is defined as the likeliness of an event to happen. It can be determined by dividing the total number of the desired outcome by the total number of samples.
The sum of the probabilities in a probability distribution is always 1.
If there are three outcomes: too cold, just right, and too hot, then the sum of their probabilities is equal to 1 or 100%.
P(too cold) + P(just right) + P(too hot) = 100%
35% + P(just right) + 50% = 100%
P(just right) = 100 - (35 + 50)
P(just right) = 100 - 85
P(just right) = 15%
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As the x-value increases by 20, the y-value increases by 10. Which of the following equations represents the relationship between the x and y-values
An equation which represents the proportional relationship between the x and y-values is: C. y = 2x.
What is direct variation?A direct variation represents two variables that are directly proportional to each other, which simply means as one variable increases, the other variable also increases and vice-versa.
How to determine the equation?Mathematically, a proportional relationship can be represented by the following equation:
y = kx
Where:
k is the constant of proportionality.y and x represent the variables in a proportional relationship.Next, we would determine the constant of proportionality (k) based on the data points given:
k = y/x
k = 20/10
k = 2
Therefore, the required equation is as follows:
y = 2x
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Complete Question:
As the x-value increases by 20, the y-value increases by 10. Which of the following equations represents the relationship between the x and y-values?
A. y = 2 + x
B. y = 2 - x
C. y = 2x
Question 2 of 10Classify the following triangle. Check all that apply.
Given -
To Find -
Type of Triangle =?
Step-by-Step Explanation -
As we can see we have an obtuse angle in the triangle and also, the two sides are equal.
So,
It is an Obtuse angle triangle.
It is also an isosceles triangle
Final Answer -
B. Obtuse
E. Isoseceles
There are 8 batteries in a package of AA batteries, and 12 batteries in
a package of AAA batteries. If you buy 10 packages of AA batteries and
6 packages of AAA batteries, how many batteries would you have?
A- 156 batteries
B- 36 batteries
C- 152 batteries
Answer:
C. 152
Step-by-step explanation:
8 × 10 + 6 × 12 = 80 + 72 = 152
Lilly has a bag only containing blue beads and purple beads.
3/8 of the beads are blue.
If there are 9 blue beads in the bag, how many beads are purple?
Answer:
15 purple beads
Step-by-step explanation:
Calculate total beads
[tex]\frac{9}{\frac{3}{8} } =\frac{72}{3} =24[/tex]
Calculate how many beads are purple
[tex]24-9=15[/tex]
Hope this helps
There are total 15 purple beads.
What is Algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.
Variables are the name given to these symbols because they lack set values.
These values are frequently represented in algebra by symbols such as x, y, z, p, or q, and these symbols are known as variables.
In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.
given:
Fraction of blue beads = 3/8
Total blue beads = 9
let the total number of beads be x.
So, 3/8x = 9
x= 9. 8/3
x= 72/3
x= 24
So, number of purple beads = 24 -9= 15 beads
Hence, there total 15 purple beads.
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PLS HELP!!!!!
31 POINTS
HELP PLEASE!!!!
10 points!!
What is the slope of the line that passes through the points (-4, 2)(−4,2) and (-5, 0)(−5,0)? Write your answer in simplest form.
Answer: 2
Step-by-step explanation:
We will use the slope formula to find the slope of the line going through these two points.
[tex]\displaystyle \frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]
[tex]\displaystyle \frac{0-2}{-5--4} =\frac{-2}{-5+4} =\frac{-2}{-1} =2[/tex]
The slope of this line is 2.
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These triangles are congruent by the triangle congruence postulate:
Answer:
SAS
Step-by-step explanation:
SAS is side, angle, side so two sides are congruent and one angle is congruent.
If you look at the picture the side that is shared by both triangles is equal.(side)
The two sides with the line through them means they're equal.
(side)
The picture shows the two angles are equal.
(angle)
=SSA or SAS
Please help I'm struggling and this is due tomorrow morning
Explain how to solve this equation I know it's 16 but I don't know how to solve it
In picture
Answer: to solve this equation, multiply both sides of the equation by 2.
Step-by-step explanation: by multiplying both sides of the equation by 2, you are effectively eliminating the fraction on the left, making the answer x = 16.
Find x so that q || r.
X =
Answer:
x = 12
Step-by-step explanation:
To justify q || r :
11x - 28 + 7x - 8 = 180 because they would be supplementary angles and their sum would be equal to 180°
add like terms
18x - 36 = 180 add 36 to both sides
18x = 216 divide both sides by 18
x = 12
URGENT!!! PLEASE HELP ME!!!
suppose the side length of a cube is measured to be 9 cm with an accuracy of 0.03 cm. use differentials to estimate the error in the computed volume of the cube.
By using differentials the error in the volume estimation is 7.29 cubic centimeters.
What is the error of the computed volume of the cube?
The volume of a cube (V), in cubic centimeters, is equal to the cube of the side length (L), in centimeters, whose formulas are:
V = L³
Now we proceed to estimate the volume differential by using first derivatives:
dV = 3 · L² · dL
Where dL is the length differential, in centimeters.
If we know that L = 9 cm and dL = 0.03 cm, then the error in the computed volume of the cube is:
dV = 3 · (9 cm)² · (0.03 cm)
dV = 7.29 cm³
The error in the volume estimation is 7.29 cubic centimeters.
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Mayumi rides her bike around a park. Each lap around the park is 2/3 mi. Mayumi rides a total of 3 mi. how many laps around the park does Mayumi ride?
Mayumi took 4.5 laps by riding her bike around the park
Distance of each lap around the park = 2/3 miles
Distance covered by Mayumi = 3 miles
Fractions: The components of a whole or group of items are represented by fractions. A fraction consists of two components. The numerator is the figure at the top of the line. It specifies the number of equal portions of the whole or collection that are taken.
Laps took by Mayumi:
Distance covered by Mayumi on her bike/Distance of each lap around the park
= 3/(2/3)
= 3*3/2
= 9/2 or 4.5 laps
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A car’s velocity increases from 4.2m/s to 14.8 m/s, E, in 2.5 sec. What is its acceleration?
Answer:
4.24ms-²
Step-by-step explanation:
S: x. write suvat and sub in values
u:4.2
v:14.8
a:?
t:2.5
use correct equation
v=u+at
sub values in
14.8=4.2+2.5a
rearrange to get a
10.6/2.5= a
a=4.24
Which ratios have the unit rate less than 1?choose all the apply
2 feet : 12/5 minutes
1/8 foot: 1 2/3 minutes
3 feet : 4 2/3 minutes
1 5/8 feet :2 minutes
A ratio displays the multiplicity of two numbers. For instance, if a dish of fruit contains eight oranges and six lemons, the ratio of oranges to lemons is eight to six. Similarly, the ratio of oranges to the overall amount of fruit is 8:14, whereas the ratio of lemons to oranges is 6:8. Ratios contrast two figures by typically dividing them. A/B would be your formula if you were comparing one data point (A) to another data point (B). This indicates that you are multiplying information A by information B. For instance, your ratio will be 5/10 if A is 5 and B is 10.
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Help me with this please
Answer:
first plot the positive 2 on the y axis
plot (0,2)
Then from (0,2) go up 2 and right 2.
Answer in attached image
A roofer tosses a hammer off the roof of a house that is 12 feet above the surface of the ground. the graph shows the height above the surface of the ground, y, in feet the hammer is x seconds after being thrown from the roof
Given
A roofer tosses a hammer off the roof of a house that is 12 feet above the surface of the ground. the graph shows the height above the surface of the ground, y, in feet the hammer is x seconds after being thrown from the roof
Solution
The final answer
Option C
Mr Tan had 2 kg of sugar
He usedkg of sugar to make dessert and kg of sugar to ooke
some cakes.
(a) What was the total mass of sugar used?
(b) How much sugar did he have left?
a) The total mass of sugar used is 1.7 kg.
b)The mass of sugar he has left is 0.3 kg.
What are fractions?A fraction is a numerical value that represents a piece of a total in mathematics. The total can be any number, a specific value, or a single item. Fractions are denoted by the symbol p/q.
Given:
Total mass of sugar Mr tan has = 2 kg
Fraction of sugar used to make dessert = 1/4 kg
Fraction of sugar used to bake some cakes = 3/5 kg
The total mass of sugar used is determined as,
= Mass of sugar used to make dessert + Mass of sugar used to bake some cakes
Mass of sugar used to make dessert = (1/4 of 2) kg = 1/2 kg
Mass of sugar used to bake some cakes = (3/5 of 2) kg = 6/5 kg
Total mass of sugar used = (1/2 + 6/5) kg = 17/10 = 1.7 kg
Mass of sugar left with him = Total mass of sugar - Total mass of sugar used
= 2 kg - 1.7 kg = 0.3 kg
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The complete question is: "Mr tan had 2 kg of sugar. He used 1/4 kg of sugar to make dessert and 3/5 kg of sugar to bake some cakes.
(a) What was the total mass of sugar used?
(b) How much sugar did he have left?"
RUNNING Stella ran her first half marathon in 2.7 hours. By how many hours must Stella reduce her time to run her next half marathon in fewer than 2.3 hours? Enter an inequality to represent the situation.
Answer:
2.7 - h < 2.3
Step-by-step explanation:
You want an inequality to represent the relationship described by "Stella wants to know the number of hours (h) by which she must reduce her 2.7 hour half-marathon time to run in under 2.3 hours."
InequalityIf h is the number of hours by which the time is reduced, Stella wants ...
2.7 -h < 2.3 . . . . . . . . . representative inequality
__
Additional comment
The solution would be h > 0.4. Stella must reduce her time by more than 0.4 hours.
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The first of two numbers is twice the second. Seven more than the second number is equalto 6 less than the first number. Find the numbers.
Let's call x to the first number ans y to the second number.
The first of two numbers is twice the second:
x = 2y
Seven more than the second number is equal to 6 less than the first number:
7 + y = x - 6
Isolating x:
7 + y + 6 = x
13 + y = x
Combining last equation with first equation:
2y = 13 + y
2y - y = 13
y = 13
Then:
x = 2*13
x = 26
The figures below are congruent. Name the corresponding sides.
The figures are congruent and the corresponding sides are AC = KM, AB = KL and BC = LM
How to find congruent figures?Congruent figures in geometry are identical in shape and size.
In other words, congruent figures are geometric figures that have the same shape and size.
If the figures are polygons, then they are congruent if all the corresponding sides and corresponding angles are congruent.
Therefore, the polygons above are triangles, they are congruent if the corresponding sides and angles are equal.
Therefore, the figures(triangles) are congruent by the following rules:
Side AC is congruent to side KMSide AB is congruent to side KLSide BC is congruent to side LMlearn more on congruent figures here: https://brainly.com/question/3453193
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State the law of logic that is illustrated.
4
Statement: If x > 12, then x +9>20. The value of x is 14. Therefore, x +9>20.
The given statement " If x > 12, then x +9>20. The value of x is 14. Therefore, x +9>20" is Hypotesis of a true conditional statement is true, so the conclusion is also true. This is Law of Detachment.
What is the hypothesis and conclusion of a conditional statement?The Hypothesis is the first or “If” portion of the conditional statement or p. The Conclusion is the second or “then” part of the conditional statement or q.
What is the truth of the conditional statement when the hypothesis true and the conclusion in true?If the hypothesis is true and the conclusion is true, the conditional statement if p, then q is true. If the hypothesis is true but the conclusion is false, the statement is false.
The following assertion "X + 9 > 20 if x > 12. X has a value of 14. Thus, x + 9 > 20 "The conclusion follows logically from the hypothesized truth of the conditional statement. This is the Detachment Law.
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7 more than half on Eli's age is Sydney's age, 11. How old is Eli?
Answer:
8 years8 years
Explanation:
Let Eli's age be represented as x
Sydney's age = 11
half on Eli's age = x/2
7 more than half on Eli's age = x/2 + 7
If 7 more than half on Eli's age is Sydney's age, then;
x/2 + 7 = 11
Subtract 7 from both sides
x/2 + 7 - 7 = 11-7
x/2 = 4
Multiply both sides by 2;
x/2 * 2 = 4 * 2
x = 4 * 2
x = 8
Hence Eli is 8 years old
A right cylinder has a radius of 5 and a height of 9. What is its surface area? O A. 72 units O B. 90 units O c. 45rt units O D. 108r units
The formula to find the surface area of a cylinder is:
[tex]\begin{gathered} SA=2\pi r^2+2\pi rh\text{ } \\ \text{ Where} \\ SA\text{ is the surface area} \\ r\text{ is the radius} \\ h\text{ is the height} \end{gathered}[/tex]In this case, we have:
[tex]\begin{gathered} r=5 \\ h=9 \end{gathered}[/tex][tex]\begin{gathered} SA=2\pi r^2+2\pi rh \\ SA=2\pi(5^2)+2\pi(5)(9) \\ SA=2\pi(25)+90\pi \\ SA=50\pi+90\pi \\ SA=140\pi \end{gathered}[/tex]AnswerB. 140π units²
A coin box contains $26.50 in dimes and quarters. There are 157 coins altogether. How many of each
type of coin are in the box?
======================================================
Work Shown:
x = number of dimes
y = number of quarters
x+y = 157 coins total
-------------------------------
$26.50 = 2650 cents
1 dime = 10 cents
x dimes = 10x cents
1 quarter = 25 cents
y quarters = 25y cents
total value = 10x+25y = 2650 cents
-------------------------------
We have this system of equations
x+y = 157
10x+25y = 2650
Let's solve for y in the first equation
x+y = 157
y = 157-x
Then plug this into the second equation and solve for x.
10x+25y = 2650
10x+25(157-x) = 2650
10x+25(157)+25(-x) = 2650
10x+3925-25x = 2650
-15x+3925 = 2650
-15x = 2650-3925
-15x = -1275
x = -1275/(-15)
x = 85 is the number of dimes
Then use this to find the value of y
y = 157-x
y = 157-85
y = 72 is the number of quarters
-------------------------------
Check:
85 dimes + 72 quarters = 157 coins total
85 dimes = 85*10 = 850 cents
72 quarters = 72*25 = 1800 cents
850 cents + 1800 cents = 2650 cents = $26.50
This confirms the answers.
Answer:
so 85 dimes and 72 quarter coins are in the box
Step-by-step explanation:
Given; Total number of coin =1557 Total amount money =26.50 To find Number of dimes and quarters in the box. In order to find the solution, make equation of number of coin and amount money. solve for unknown.Let, Number of dimes = x Number of quarters = y As, it is given that total number of coin is 157. x + y = 157 ......(a) Also, the total money is $ 26.50. .. 0.10x+0.25y = 26.50 ..(b)To, solve equation (a) & (b), put value of y from (a) to (b); From (b); From (a); y= 157 0.10x+0.25(157 - x) = 26.50 0.10x+39.25 - 0.25x = 26.50 0.15x+39.25 = 26.50 39.25 26.50 = 0.15x 12.75 = 0.15x 12.75 0.15 = x 85 = x Now, put value of x in equation (a); x + y 85+ y = y= 72
difference between a number and its positive square root is 12.find the number
Answer:16
Step-by-step explanation:
x-[tex]\sqrt{x}[/tex]=12
x=16
please help quickly.
Answer:
Step-by-step explanation:
5) Domain: -3<=x<=2
Range: 4<=y<=-3
6) Domain: {-3,-2,-1,0,1,2}
Range: {4,3,2,1,0,-1,-2,-3}
Do you need number 7 too?
:]
Three students have summer jobs. The proportional relationship between their pay and the hours they work is shown.
Student A:
Time (hours) 5 13
Pay (dollars) 67.50 175.50
Student B: $189.00 for 14 hours
Student C: The equation p = 13.5h, where p represents total pay and h represents hours worked
Which student is paid the most for 20 hours of work?
All the students are paid equal amount of $270. Therefore, no oneis paid more.
How to illustrate the information?For student A, the amount paid for 20 hours will be:
= (67.50 / 5) × 20
= 13.50 × 20
= $270
For student B, the amount paid for 20 hours will be:
= (189/14) × 20.
= $270
For Student C, the amount paid for 20 hours will be:
p = 13.5h
where h = number of hours
p = 13.5 × 20 = $270
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Answer:
D yeyeyeye! <3