Mathematics Middle School

I will give brainlest for the right answer. Please don't just make up a random thing. PLEASE!
Which expression is equivalent to 30(1/2x-2)+40(3/4y-4)?
45xy-220
15x-30y-220
15x+30y-220
15x+30y-64

Answers

Answer 1

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[tex]30( \frac{1}{2} x - 2) + 40( \frac{3}{4} y - 4) = \\ [/tex]

[tex](30 \times \frac{1}{2} x) -( 30 \times 2 )+ (40 \times \frac{3}{4} y )- (40 \times 4 )= \\ [/tex]

[tex]15x - 60 + 30y - 160 = \\ [/tex]

[tex]15x + 30y - 220[/tex]

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The correct answer is Option Three .

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Related Questions

A recipe calls for 11 tablespoons of milk for every 16 cups of flour. If the chef puts in 80 cups of flour, how many tablespoons of milk must the chef add?

Answers

Answer:

40

Step-by-step explanation:

The answer would be 40!
Hope this helps

An animal gained 4 pounds steadily over 8 years. What is the unit rate of pounds per year?​

Answers

Answer:

Step-by-step explanation:

4/8 = .5 pounds/year

the answer is .5 lbs a year

Create a proportion using the form = to represent the following word problem.

78% of what number is 42?

Answers

Answer :
x = 53.85

Step by step explanation:
If 78% of x (some numbers) is equal to 42, then we must set this as an equation to find it.

1) Rewriting 78% as a fraction and considering that when we say 78% of some number (x) we mean a product.
78% = 78/100 ➡️ 78/100x = 42

2) Then we can go on :
100 * 78/100x = 42 * 100
78x = 4200
78x/78 = 4200/78 ➡️ x = 53.85

3) Alternatively, simply dividing 42 by 0.78 (78%) would come to the same result :

42/0.78 = 53.85
To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 42 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 42 is 100%, so we can write it down as 42=100%.
4. We know, that x is 78% of the output value, so we can write it down as x=78%.
5. Now we have two simple equations:
1) 42=100%
2) x=78%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
42/x=100%/78%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 78% of 42

42/x=100/78
(42/x)*x=(100/78)*x - we multiply both sides of the equation by x
42=1.28205128205*x - we divide both sides of the equation by (1.28205128205) to get x
42/1.28205128205=x
32.76=x
x=32.76

I need help with this question.
Help needed!!!!!!!

Answers

Answer:

32

Step-by-step explanation:

Answer:

The answer is A

Step-by-step explanation:

The answer is A because the possibilities of the possibility that the answer is 'A' is just another possibility, so you just have to trust that possibility of a possibility and answer A ;)

In the town of Clover, 3 out of 5 citizens who are eligible to vote did so in the fall election. Determine the number of citizens that were eligible to vote in the fall election if 180 actually voted

Answers

Answer:

108

Step-by-step explanation:

Because 3/5(180) is 108!

Answer:

60 citizens

Step-by-step explanation:

i may be wrong but I think thsi because 180 divided by 3 = 60

Please help with homework

Answers

For A the answer is 40

Sorry I could only find find for A

Could you give brainliest

Enola spent $48 at a used book store where hardback books sell for $12 each and paperback books sell for $8 each.

A. Write an equation in standard form where x represents the number of hardback books and y represents the number of paperback books she bought that day:




B. If she bought 2 hardback books how many paperback books did she buy?

Answers

Answer:

A. 48= 12x + 8y

B.  3 paper back books

Step-by-step explanation:

A. If x represents hardback book, and they are $12 each then that is 12x. y = the paperback books that are $8 each, so 8y. and 48 is the amount that Enola spent.

B. 2 hardback books would equal $24.  If you had 3 paperback books that would equal $24. And the two together to get the total amount of $48.

Yes.







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D
D
D



Be ause i know

HELP AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH


x + 2x + 12y + 4

What are the variables of this expression?

Answers

Answer:

3x+12y+4 -- is the simplified version, variables would be x and y

This is the last one for now I promise... - w -
the question is below.

Answers

Answer: y= x +3

1) find slope using rise over run. Find your coordinates. I used (-3,0) and (0,3). Rise over run with these values : 3-0/0- -3. You should get 1 as a slope after adding and simplifying. Y=1x+b is your equation. Plug in your y and x values to the equation: 3= 0x1 +b. Multiply: 3= 0+b. B is 3( your y intercept). The equation is y=x+3

Answer:y =4,-6 hope this helps you i do my best to helps you and if it did say thanks and if you have anymore questions feel free to ask and plz rate me brainest if it did have a good night

Step-by-step explanation:

The boundary line on the graph represents the equation
5x + 2y= 6.
Write an inequality that is represented by the graph.

Answers

5x+26< 6 maybe this is the answer
5x + 2y=6 that your answer

Is this right? I chose 0.25. The other answers are 4, 0.5 and 2.

Answers

Answer:

its 0.25 or 2 one of those

Step-by-step explanation:

most likely 0.25 but

Derrick really wants to earn at least $330 at the Bike Shop. He earns $150 per week plus $15.50 for each bicycle that he assembles. How many bikes will he need to assemble this week in order to earn at least $330? (be careful when rounding in a real world problem to make sure that your answer works) Question 1 options: 10 bikes , 11 bikes , 12 bikes , 13 bikes

Answers

Answer: He will need to assemble 12 bikes, because 12 x 15.50 = $186 and $186 + 150 = $336

Step-by-step explanation: Don't need one :)) it's basic math

330-150= 180 then divide 180 by 15.50 and you will get 11.6129 and you can round that to 12 bikes

Ann​'s car can go 132 miles on 4 gallons of gas. During a drive last​ weekend, she used 7 of gas. How far did she ​drive? Explain how the problem changes if you were given the distance Ann drove last weekend instead of how much gas she used.

Answers

Answer:44 Step-by-step explanation:

Answer:

multiply 132x4x7 and see how many gallons of gas

Convert 3.25 kilograms to grams.
(1 kilogram = 1,000 grams)
Group of answer choices

0.000325

0.00325

325

3250

Answers

Answer:

3250

Step-by-step explanation;

3.25 * 1000 = 3250

Select Four answers.
2/12
1/4
2/8
6/12
4/16
3/12

Answers

Answer:

What theres no question in this?

Step-by-step explanation:

1/4 2/8 4/16 and 3/12

Stacy and Neil painted 280 ft2 of their living room wall with 4/5 gallon of paint. How many square feet can they paint with 4 gallons of paint?

Answers

Answer:

56

Step-by-step explanation:

Divide 280 by 4/5 and get 14 then multiply by 4 and get 56

Answer:

1400 ft2

Step-by-step explanation:

if 280 ft2 comes from 4/5 of 1 gallon of paint, then do 280 x 4, because their are 4 gallons of paint. after you x that it will be 1120 ft2. but the extra 1/5 paint from all 4 of the gallons comes out to 4/5 so add 280 ft2 to that 1120 ft2.

it comes out to 1400 ft2.

Which inequality describes all the solutions to -3(4 – x) + 6 < 9 – 2x?

Answers

Answer:

To do inequalities, you just need to solve the equality and then figure out what side (higher or lower) the solution is on and put in the appropriate greater-than, less-than, greater-than-or-equal-to or less-than-or-equal-to sign.

 

Think about the equality for this one. What equation could we right for the average number of words per week that would put Trevor right at 50,000 after 5 weeks.

 

If we call the number of words per week, w, we would have

 

w = [an expression]   (You find the expression using the number of words he has to write and how many weeks he has.)

 

Now think about the inequality. Trevor wants to finish in five weeks or less. So as long as he writes at least this number of words per week, he'll make it. That means we want a greater-than-or-equal to sign:

 

w ≥ [your expression]

Step-by-step explanation:

The inequality which describes all the solutions to the inequality is

x < 3

Given the inequality expression given as -3(4 – x) + 6 < 9 – 2x, we need to find the solution to the system of inequality as shown:

[tex]-3(4 -x) + 6 < 9 - 2x[/tex]

Expand the bracket

[tex]-3(4 -x) + 6 < 9 - 2x\\-12+3x+6<9-2x\\3x-6<9-2x\\3x+2x<9+6\\5x<15\\x<15/5\\x<3[/tex]

Hence the inequality which describes all the solutions to the inequality is

x < 3

Learn more here: https://brainly.com/question/15816805

Thomas decides to use the method of proportions and similar
triangles to find the height of a lamppost. He measures the length of
the post's shadow and finds it is 5 feet long. Then, he holds a 1-foot
ruler perpendicular to the ground and finds that it casts a 2-inch
shadow. How tall is the lamppost?
a. 2.5 ft c. 30 ft
b. 12 ft d. 60 ft

Answers

Answer:

The lamppost is 30 ft tall.

Step-by-step explanation:

You need to draw a diagram of the problem. Refer to attachment.

Now you need to convert the measurements that are in feet to in. The 1 foot ruler is now 12 in. and the 5 foot post's shadow is now 60 in.

The next step is to create a proportion between both angles. [tex]\frac{x}{1} =\frac{60}{2}[/tex]

x over 1 is simplified to x and 60 divided by 2 is just 30. So the lamppost is 30 ft tall.

Hope that helped. :)

I’m pretty sure it’s C

What is the difference of 16.43 – 1.043?
A 10.387
b 15.387
C 15.630

Answers

Answer:

B

Step-by-step explanation:

Just subtract

16.43-1.043=15.387

You can estimate to make it easier. :D

the answer is b - 15.387

[PICTURE ATTACHED] sigh, another variability one. if u get it correct, i’ll make you brainliest! :’)

Answers

Answer: B

Step-by-step explanation:

Option B

How many books have each of my classmates read this year?

Step-by-step explanation:

Every year the number of books each classmate read would be different

Amelia needs to buy some cat food.At the nearest store,5 bags cost $28.75.How much would Amelia spend on 2 bags of cat food? Amelia would spend $ on 2 bags of cat food.

Answers

Answer:

$11.50

Step-by-step explanation:

A math test has 12 multiplication problems and 24 division problems.

What is the ratio value of division problems to total problems? [Type your answer as a fraction in simplest form, and use / for the fraction bar.]
help help h e l p

Answers

Answer:

2 : 1

Step-by-step explanation:

24 to 12

divide by 12

2 to 1

its just simplifying

Answer:

2:1

Step-by-step explanation:

Henry divided his socks into five groups. Let s represent the total number of socks. Which expression and solution represent the number of socks in each group if s=20?

A. S/5; when s=20, the number of socks in each group is 4.


B. S/5; when s=20, the number of socks in each group is 15.


C. S-5; when s=20, the number of socks in each group is 4.


D. s-5; when s=20, the number of socks in each group is 15.

Pls help

Answers

Answer:

A

Step-by-step explanation:

If Henry has 20 socks and he split them into a group of 5, he would have 4 socks in each group. To solve this equation you must divide the number of socks by the number of groups. Once you do this, you will get the number of socks in each group.

Answer:

a

Step-by-step explanation:

The population of a town can be modeled by f(x) = 17,200 * 1.1^x. Identify the initial value of the population. Is the population increasing or decreasing? What is the growth or decay factor? How does the population change each year?

Answers

Answer:11

Step-by-step explanation:

11

Mr. Rankin took his family out to dinner last night and their subtotal was $88.24. The sales tax was 5% and he left a 20% tip after the tax was added.

Answers

Answer:

$8.82

Step-by-step explanation:

The marine needs 14 boats for the 42 people registered for a boat race. How many boats will they need for 6 people?​

Answers

Answer:

2

Step-by-step explanation:

We can write a proportion to determine

42 people          6 people

---------------- = ----------------

14 boats                x boats

Using cross products

42x = 6*14

42x =84

Divide each side by 42

42x/42 = 84/42

x = 2

They will need 2 boats

A store sells a hoodie for $45, the sales tax rate in this state is 8%. What is the total price with sales tax applied?

Answers

The answer is $48.60.

The hoodie by itself has a price of $45. If the sales tax if 8% of the price you’d have to calculate the sales tax and add it to the net amount.

(45)(.08) = 3.60

(45) + 3.60 = 48.60
$48.60. multiply 45 by 0.08 to find the tax, which is $3.60. add the price plus the tax and you have the end price, which is $48.60

Michael decided to make French toast. He finds a recipe that calls for the following ingredients:

FRENCH TOAST
8 slices of bread
4 eggs
2 cup of milk
1 teaspoon of cinnamon

Which of the following comparison statements describe how much milk is used for the slices of bread used (There are 2 correct answers)?
A.1/4 cup of milk for every 1 slices of bread
B.2 cup of milk for every 8 slice of bread
C.1 cup of milk for every 1 slice of bread
D.1 cup of milk for every 1/8 slice of bread
E.4 cups of milk for every 1 slice of bread

Answers

The answer is B, two cups of milk for every 8 cups of bread.

This is because when using a recipe you want to make sure to get the proportions right and the ratio of milk to bread is 2:8
The answer is B for sure good luck

PLEASE HELP!!
Write an equation to represent the following statement.
51 divided by 3 is k.
Solve for k.

Answers

Answer:

51 divided by 3 is 17

Step-by-step explanation:

Hope this helps

51 divided by 3 is 17. k = 17

[6 × (4 − 2) + (21 × 2/3 + 1)] ÷ 3²
If you can, please explain.

Answers

Answer:

3

Step-by-step explanation:

Use BODMAS

solve the ones in brackets first followed by multiplication/division based on the order given

Answer:

3

Step-by-step explanation:

[6 x (4 - 2) + (21 x 2/3 + 1)] ÷ 3^2

[6 x 2 + (21 x 2/3 + 1)] ÷ 3^2

21 x 2/3 = 42/3 = 14

[6 x 2 + (14 + 1)] ÷ 3^2

[6 x 2 + 15] ÷ 3^2

[12 + 15] ÷ 3^2

27 ÷ 3^2

3 x 3 = 9

27 ÷ 9 = 3

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