how many solutions does the following system have?
7x+5y=4; -21x-15y=-12

a)infinitely many solutions
b)one solution
c)two solutions
d)no solutions

Answers

Answer 1

Answer:

Step-by-step explanation:

we can observe that the second equation is the product of the first equation and -3

there will be infinitely many solutions


Related Questions

4. 8(0 - 9) = 6(2 - 12) - 40

Answers

Answer:

[tex]False[/tex]

Step-by-step explanation:

[tex]--------------------------------------------[/tex]

[tex]8\left(0-9\right)[/tex] = [tex]-72[/tex]

[tex]6\left(2-12\right)-40[/tex] = [tex]-100[/tex]

[tex]Does[/tex] [tex]-72[/tex] [tex]equal[/tex] [tex]-100?[/tex]

[tex]N[/tex] [tex]O[/tex]

[tex]So[/tex], [tex]the[/tex] [tex]answer[/tex] [tex]is[/tex] [tex]false.[/tex]

[tex]--------------------------------------------[/tex]

Hope this helps! <3

[tex]--------------------------------------------[/tex]

The equation Y equals 15 X +30 can be used to model the earnings of a part time employees at a local department store where X represents the number of hours worked and Y represents the total earnings is the equation to determine the hourly rate of a part time employee

Answers

Yes babcwjqkausvwbwnbx jwhwcwvg

Find the degree of the polynomial below. -7x

Answers

Answer:

1

Step-by-step explanation:

The degree is 1.

What is an equation of the line that passes through the point (-3,1) and is parallel to the line 4x + 3y = 15?​

Answers

Answer:

y=-4/3x-3

Step-by-step explanation:

The equation of the line that passes through the given point will be equal to (-4/3)x - 3.

What is an equation?

Equations are mathematical expressions that have two algebras on either side of an equal (=) sign. The expressions on the left and right are shown to be equal, demonstrating this relationship. L.H.S. = R.H.S. (left-hand side = right side) is a fundamental simple equation.

As per the given information in the question,

The given equation is,

4x + 3y = 15

And the point is (-3, 1)

3y = 15 - 4x

y = (-4/3)x + 15

The line has a slope, of -4/3.

Then, use the equation,

B = y - mx

B = 1 - (-4/3 × 3)

B = -3

So,

y = (-4/3)x - 3

To know more about Equation:

https://brainly.com/question/29657983

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How do you write 80% as a decimal?

Answers

Answer:

0.8

Step-by-step explanation:

It would be 80/100, move over two times, the decimal is 0.80

Lillian has a defined benefit plan that promises an annual retirement benefit based on 2% of her final 3-year average annual salary for each year of service. At retirement, Lillian has 15 years of service and had an average salary of $80,000 over the last 3 years. What is the amount of her annual benefit?

Answers

Answer:

the amount of her annual benefit is $24,000

Step-by-step explanation:

The computation of the amount of her annual benefit is as follows:

= Given percentage × average salary × number of years of service

= 2% × $80,000 × 15 years

= $24,000

Hence, the amount of her annual benefit is $24,000

We simply applied the above formula so that the correct value could come

And, the same is to be considered

Based on the information given the amount of her annual benefit is $24,000.

Using this formula

Annual benefit= Annual retirement benefit percentage × Average salary × Years of service

Where:

Annual retirement benefit percentage=2% or 0.02

Average salary=$80,000

Years of service=15 years

Let plug in the formula

Annual benefit= 0.02 × $80,000 × 15 years

Annual benefit=$24,000

Inconclusion  the amount of her annual benefit is $24,000.

Learn more about annual benefit here:https://brainly.com/question/3265552

can someone help fast​

Answers

C because it’s a straight line starting at 0
It’s C!!!!!!!!!!!!!!!!!

Solve the following equation for the
variable f. f/4 = 6.
f = 10
f = 24
f = -2
f = 2

Answers

Answer:

F=24

Step-by-step explanation:

Multiply all terms by the same value to eliminate fraction denominators

4 x f/4 = 4 x 6

So f=24

Answer:

hi

Step-by-step explanation:

Write and solve an equation to find the number:

The perimeter of a rectangle patio is 64 feet. The length is 10 feet longer than the width.

What is the width of the patio (no units needed)

Answers

Answer:

11=w

Step-by-step explanation:

l = 10+ w

w = w

64= 2(10+w) + 2(w)

64= 20+2w +2w  

64=20+4w

44=4w

11=w

5(2x + 7) -3x = 7(x+5) one solution, infinitely many, or no solutions?

help I'm on a timed math test this is my last one I have already tried doing it​

Answers

Answer:

Infinite

Step-by-step explanation:

The answer will be 0=0 and that's mean the answers will be infinite

1)Tyrone is scuba diving in the ocean and is currently at a depth of 47 feet below sea level.
2)Enter the integer that represents Tyrone's current depth.

Answers

Answer:

-47 Feet

Step-by-step explanation:

He is 47 feet below sea level, so he would be at -47 feet. If you are asking how deep he is, then it would be just positive 47 feet.

Find the value of this expression if x= -2 and y=3. x^2y/5

Answers

The answer of the expression would be -12/5


At the start of the month, Stephen’s savings account had a balance of $1,624. He made a $420 withdrawal each week for four weeks. During that month, he also made two deposits of $600 each and one deposit of $1,000. What was the balance in Stephen’s account at the end of the month?

Answers

Answer:

- 1625

Step-by-step explanation:

420 times 4 = 1680

1624 - 1680 = -56

-56 - 600 - 1000 = -1625

BRAINLIEST PLEASE

please help please please help

Answers

It should be 3/16 sense there is 16 balls in total in Team A's basket.

Shawn wants to make the perimeter of the fence in his backyard 2.5 times the size it currently is. What scale factor should he use to dilate the dimensions of the fence? a. Scale factor of 2.5 b. Scale factor of 5 c. Scale factor of 6.25 d. Scale factor of 3

Answers

Answer:

a scale factor of 2.5

Step-by-step explanation:

if this was area, you would square. Therfore if it is only perimeter so you only have to multiply by the same number

IM SO CONFUSED!! Plz Help, I will mark brainliest to whoever completes the table correctly!!

Complete the table below to solve the equation 2.5x − 10.5 = 64(0.5x).


x f(x) = 2.5x − 10.5 g(x) = 64(0.5x)

2

3

4

5

6

Answers

Answer:

f(2) = 15.5

f(3) = 18

f(4) = 20.5

f(5) = 23

f(6) = 25.5

g(2) = 64

g(3) = 96

g(4) = 128

g(5) = 160

g(6) = 192

Step-by-step explanation:

plug it all in to the equations

Answer:

i took the test and heres what i got

Step-by-step explanation:

How many teaspoons of chili powder
would there be if there were 20
teaspoons of cumin?

Answers

Answer:

there would be 20 tsp of chillie powder for 5 tsp of cumin

Step-by-step explanation:

4 tsps of chilliw per 1 tsp for cumin

Determine if the function is even, odd, or neither.

Answers

Answer:

Even

Step-by-step explanation:

I think that it's even because the graph is reapeted, if it's odd, it's going to be like x^3

try it on desmos

even the ends of the waves are heading the same direction(up) if its odd one will be(one up and one down) even(both up/both down)

help pls!! i will give brainliest

Answers

Answer:

It is linear because there's a constant change in both x and y

Step-by-step explanation:

There is a constant change in x: +3

There is a constant change in y: -2

Therefore, the slope is -3/2, making the function linear.

how many boys perfer the ferris wheel?

Answers

Answer:

10 Boys

Step-by-step explanation:

10 boys prefer the Ferris wheel because the total amount of boys is 35, but 23 of those 35 boys prefers the Super Slide, meaning what's left is who prefers the Ferris wheel since there are only 2 options for them to choose from.

35 boys - 23 boys (who like the Super Slide) = 10 boys (the remainder who likes the Ferris wheel).

≧◡≦

Mocha here! If this answer helped you, please consider giving it brainliest because I would appreciate it greatly. Have a wonderful day!

10 boys because they have to school tomorrow and then I can play with my friends at the same school lol I can get you to the school and I can play with my kids if I don’t want you out and then you have a birthday and then you go out to school and I get you out and I can play play it on my birthday if I get home I’m not gonna play with me I just don’t know if it’s not ok with that I’m going out with the bus I just don’t know if it’s a because

Which statement correctly describes the expression (–12)7

Answers

Answer:

answer #n

Step-by-step explanation:

we cant see the options

Answer:

One factor is positive and one factor is negative, so the product will be negative.

Step-by-step explanation:

help plzzzzzzzzzzzzzz ​

Answers

Answer:

A (SSS)

Step-by-step explanation:

The triangles are congruent by postulate side side side

A theater company charges $9.50 per ticket for people of all age groups. If c represents the total number of children who bought tickets and a represents the total number of adults who bought tickets, which expression best represents the total money earned by the company from the sale of tickets? (5 points) Question 2 options: 1) 9.5c + a 2) 9.5(c + a) 3) c + 9.5a 4) 19(c + a)

Answers

Answer:

2

Step-by-step explanation:

because whether a child or an adult buys the ticket it is still $9.50

Answer:

B.

Step-by-step explanation:

lines l and m are parallel line i is represented by the equation 3x+4y=8 if line m passes through the point (2,-5) which equation represenrs line m

A y-5=-3/4 (x+2)
B y+5= -3/4(x-2)
C y-5= 4/3(x+2)
D y+5= 4/3(x-2)

Answers

Answer:

B

Step-by-step explanation:

because the math

Richie's gym is charging a one-time fee of $55 to join an additional 15 per month what is the cost after 6 months
A.$60 for 6 months
B.$145 for 6 months
C.$825 for 6 months
D.$165 for 6 months​

Answers

The answer is B
you’re welcome

z= 77-27.8i
what are the real and imaginary parts of z

Answers

Answer:

49.19

Step-by-step explanation:

simple

Answer:

b on khan

Step-by-step explanation:

please help asap , explain how you got the answer .

Answers

Answer:

f(x)= -2/5x-4

Step-by-step explanation:

-2/5 is the slope and -4 is the y intercept

If PQRS is a parallelogram, what is the length of RS?

Answers

Answer:

Your answer would be 35

Step-by-step explanation:

Because if you look at PQ it is lined up with RS and you will get you answer by just looking at PQ.

____________________________________________________________

HOPE THIS HELPS!!!!!

Answer: 35

the green checkmark appeared after clicking on it

Use the equation to answer the question.
125 = 25 x 5
Which statement does the equation represent?
O A. 25 is 5 more than 125
B. 25 is 5 times as many as 125
C. 125 is 25 more than 5
D. 125 is 25 times as many as 5

Answers

Answer:

its either A/B

Step-by-step explanation:

The answer Is B well I Think cause that how I learned it

An internal angle of a regular polygon is 160 degrees, how many sides does it have

Answers

They should have 53
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