3 years ago

Solve the system of equations 3x – 3y = 30 and 2x + y = 11 by combining the equations.

1 answer:

6 0

Times bottom equation by 3 and top by 2 to get the same coefficient of x
6x-6y=60
6x+3y=33
Minus the bottom by the top
-9y=27
y=-3
substitute this in to one of the equations
2x -3 = 11
add 3 to both sides
2x=14
x=7

You might be interested in

Using side lengths only, could the triangles be similar?

pshichka [43]

Answer:

No, StartFraction 0.5 Over 1 EndFraction not-equals StartFraction 1 Over 1.5 EndFraction not-equals StartFraction 1.5 Over 2 EndFraction.

ANSWER 1

Step-by-step explanation:

took the test..

4 0

3 years ago

Read 2 more answers

one bucket of gravel has a mass of 7.05 kilograms. what is the mass for 20 buckets of gravel in kilograms

Westkost [7]

Answer:

tell me if am wrong.

Step-by-step explanation:

1 bucket=7.05kg

20 bucket=20*7.05=141 kg

the mass of 20 bucket is 141 kilogram(kg)

5 0

2 years ago

Pint-Sized Portraits has 4 different backgrounds and 5 poses in which to photograph children. How many different pictures are th

mestny [16]

Your answer is: 20

They have 4 different backgrounds and 5 different poses which means you just have to multiply the 4 backgrounds*the 5 different poses to discover how many different pictures you could have at the most.

hope this helps!

4 0

3 years ago

Factor each completely <br><br> 3) rns_ 9m + 8m"-9m+8

Jet001 [13]

İn the picture

Good luck :)