5r-4 and r=-5 so it would be 5(-5)=-20, then -4 , so is is -24
#1)
Answer:
x=1 and y=12
Explanation:
y=5x+7
y=2x+10
This system should use substitution because the value of y is given in terms if x.
Substitution:
5x+7=2x+10
Solve:
3x=3
x=1
Substitute x to solve for y by plugging x into one if the original equations(doesn’t matter which one is used).
y=5x+7
y=5(1)+7
y=5+7
y=12
#2)
Answer:
x=-8 and y=2
Explanation:
y=2x+18
9y=-2x+2
This system also uses substitution. The value of y us already given in terms if c in the first equations, so we will substitute in the second equation.
Substitute:
9(2x+18)=-2x+2
Solve:
18x+162=-2x+2
20x=-160
x=-8
Now that we have the value if x, plug it into one of the original equations(doesn’t matter which equation) and substitute to find y.
y=2x+18
Substitute:
y=2(-8)+18
Solve:
y=-16+18
y=2
Answer:
19.6%
Step-by-step explanation:
Answer:
the answer to you question is C
Step-by-step explanation:
if this helps lmk and have a brilliant day :D
Answer:
$32
Step-by-step explanation:
You will pay $32 for a item with original price of $40 when discounted 20%. In this example, if you buy an item at $40 with 20% discount, you will pay 40 - 8 = 32 dollars.
Have an amazing day friend! :D
