2 years ago

Which ordered pair is the solution to the system of equations?

1 answer:

4 0

$\begin{cases}-3x+4y=-20\\y=x-4\end{cases}\\\\\\-3x+4(x-4)=-20\\\\-3x+4x-16=-20\\\\x-16=-20\quad|+16\\\\x-16+16=-20+16\\\\\boxed{x=-4}\\\\\\y=x-4\\\\y=-4-4\\\\\boxed{y=-8}$

Answer C.

You might be interested in

At the beginning of the month, there were 80 ounces of peanut butter in the pantry. Since then, our family has eaten 30% of the

ZanzabumX [31]

Answer:

A. 0.7 x 80

Step-by-step explanation:

At the beginning of the month, there is 100% remaining of the peanut butter. 100% = 80 oz. After eating 30%, that's 100%-30%=70%. 70%=0.7

5 0

2 years ago

Read 2 more answers

Solve<br> (-4 + -7)(-3) <br> please!!!!!!!!!!!!!!!!!!!!!!!!!

miss Akunina [59]

So you add whats in parentheses first which gives you -11 then you end up with -11(-3)

Which will equal 33 Thats your final awnser...

6 0

1 year ago

Read 2 more answers

A bag contains purple marbles and blue marbles, 84 in total. The number of purple marbles is 9 more than 4 times the number of b

Flura [38]

Answer: there are 32 purple marbles in the bag

Step-by-step explanation:

did the test

5 0

2 years ago

Read 2 more answers

2/5(-10x + 5) + 8x = 3(2x + 6) - 10

zheka24 [161]

Answer:

-3

Step-by-step explanation:

2/5(-10x+5)+8x=3(2x+6)-10

-20/5x+10/5+8x=6x+18-10

-4x+2+8x=6x+8

-4x+8x=6x+8-2

4x=6x+6

4x-6x=6

-2x=6

x=6/-2

x=-3

8 0

1 year ago

I have to do this again because it didn’t show my picture

Oxana [17]

Answer to the second question.

Step-by-step explanation:

3⁴ simply means 3×3×3×3=81

3² 3×3=9

81/9=9

8 0

2 years ago