All categories

3 years ago

Solve this system of equations without graphing and show your reasoning

Mathematics

1 answer:

Drupady [299]3 years ago

7 0

Answer:

x = 1/5

y = 6

Step-by-step explanation:

System:

{5x + y = 7

{20x + 2 = y

First equation:

5x + y = 7 -> y = -5x + 7

Plug into second equation:

20x + 2 = -5x + 7

Subtract 2 from both sides:

20x = -5x + 5

Add 5x to both sides:

25x = 5

Divde both sides by 25:

x = 5/25 -> 1/5

~~~~~~~~~~~~~~~~~~~~~~~~~~~`

Come back to the first equation:

5x + y = 7

Plus in our x:

5(1/5) + y = 7

Multiply:

1 + y = 7

Subtract 1 from both sides:

y = 6

Hope this helps, have a nice day! :D

You might be interested in

A student spelled 92% of the words on a spelling test correctly. If the test had 24 questions, how many words did the student sp

Olegator [25]

Answer:

Step-by-step explanation:

3 0

3 years ago

I cant seem to figure this out. Help

SashulF [63]

You’re gonna figure out the area of each side first. I’d recommend labeling them by letter to help keep track. Do 8x5=40 then multiply 40 by 2 (because there are two sides that are 8x5) then do 3x4 which is 12 usually you would divide 12 by 2 to get the area of a triangle but in this case just leave it alone because there are two triangles. Then do 3x8 for the rectangle (24) then you’re gonna add all the sides together. So 40+40+12(or 6+6) +24...youre answer should me 116

6 0

3 years ago

Read 2 more answers

A child is hopping along a sidewalk. The ratio table below shows the comparison between the number of hops and the distance trav

Vlad1618 [11]

Answer:

its not B Or C

Step-by-step explanation:

Iruled it out, and its not C so its A or D.

I hope This helps! Brainliest me if you want!

5 0

3 years ago