3 years ago

4x-3y=12 y=7x-4 substitution method

Mathematics

1 answer:

mestny [16]3 years ago

3 0

Answer: x = 0 , y = -4

Step-by-step explanation:

4x - 3y = 12 } Equation 1

y = 7x - 4 } Equation 2

<em>We can substitute the value of y from equation 2 in equation 1: </em>

4x - 3(7x - 4) = 12

4x - 21x + 12 = 12

-17x = 12-12

-17x = 0

x = 0

<em>Now we can substitute this value of x in equation 2 :</em>

y = 7x - 4 } Equation 2

y = 7·0 - 4 = -4

Answer: x = 0 , y = -4

<h2><em>Spymore</em></h2>

You might be interested in

Juan made an 80% on his chemistry test. If there were 20 questions, how many questions did Juan get correct?

andrew11 [14]

Answer:16 good questions

Step-by-step explanation:

4 0

3 years ago

Mr. Ross is purchasing a table and chairs for $1350,including tax and interest. He will pay for the furniture with monthly payme

max2010maxim [7]

To determine the remaining balance, you have to subtract the monthly payment times the number of payments from the purchase price. Speaking mathematically, the equation would be

r = $1350 - $75m

Thus, the answer is letter C.

3 0

4 years ago

Alex has 3000 g of jelly beans he is filling boxes they each hold a kilogram of jelly beans and selling the boxes for $9.95 how

butalik [34]

Answer: 29.95

Step-by-step explanation:

1st step: 3000g = 3kl 1

2nd step: 3 times 9.95 = 29.85

ANSWER: 29.85

4 0

3 years ago

Read 2 more answers

A shop recorded total sales of $2,000 on Monday. On Tuesday, its sales fell by 10%. On Wednesday, sales fell by another 20% comp

enyata [817]

2000 - Monday
2000 - 0.10(2000) = 1800 -- Tuesday
1800 - .20(1800) = 1440 -- Wednesday
.25(2000) + 1440 = 1940 -- Thursday

net change = 2000 - 1940 = 60 <== net change

7 0

4 years ago

Please help i need answer asap

Mandarinka [93]

Step-by-step explanation:

B is the correct answer, i know yhos i fif iy on edge

6 0

3 years ago

Read 2 more answers