Answer:
option 4
Step-by-step explanation:
The perimeter is the sum of the sides , then
perimeter = x + x + y + y + yz ← collect like terms
= 2x + 2y + yz
Okay, here we have this:
Considering the provided information, we are going to calculate the requested value, so we obtain the following rule of three:

Solving for x:

Finally we obtain that 87.5mL of water should be used for 250g of plaster.
Answer:
5,8, 3.5,7
Step-by-step explanation:
Part 1: 6x+ -10y+ -2z+ 12
Part 2: What order do you want it to be?
6x+12+-10y+-2z
-2z+-10y+6x+12
Part 3:
2(3x+-5y+-z+6)
The distance flown by plane is 750 kilometers.
Step-by-step explanation:
Let,
Distance traveled by plane = x
Distance traveled by car = y
Total distance = x+y
According to given statement;
The distance by car was 125 kilometers less than the distance by plane.
y = x - 125 => x=y+125 Eqn 1
The total distance was 500 kilometers less than three times the distance traveled by car.
Total distance = 3y - 500
x+y=3y-500 Eqn 2
Putting value of x from Eqn 1;

Putting y=625 in Eqn 1

The distance flown by plane is 750 kilometers.
Keywords: linear equations, substitution method
Learn more about linear equations at:
#LearnwithBrainly