ah, those are systems you want one variable to cancel out. I would time the bottom equation by -1 so x cancels then u solve for y. then u plug all back in to solve for x.

7 0

3 years ago

What is –2c = –c − 4

crimeas [40]

Answer:

c=4

Step-by-step explanation:

–2c = –c − 4

add c to both sides

-1c=-4

divide both sides by -1

c=4

6 0

2 years ago

Read 2 more answers

290 pennies are equal to how many dimes

ExtremeBDS [4]

29 dimes
............

6 0

3 years ago

Read 2 more answers

Alex’s printer can print 8 photos in 12 minutes.

Gre4nikov [31]

Answer:

$120\ minutes$

Step-by-step explanation:

step 1

Alex’s printer

we know that

print 8 photos in 12 minutes

by proportion

Find how long will it take the printer to print 120 photos

$\frac{12}{8}=\frac{x}{120}\\ \\x=120*12/8\\ \\x=180\ minutes$

step 2

Khalil’s printer

we know that

print 24 photos in 1 hour (60 minutes)

by proportion

Find how long will it take the printer to print 120 photos

$\frac{60}{24}=\frac{x}{120}\\ \\x=120*60/24\\ \\x=300\ minutes$

step 3

Find the difference

$300\ minutes-180\ minutes=120\ minutes$

7 0

2 years ago