Answer:
DE=5*8=40
Step-by-step explanation:
DE+EF=DF
5x+17x-20=20x-4
22x-20=20x-4
22x-20x=-4+20
2x=16
x=16/2
x=8
DE=5x
DE=5*8=40
<span>Let n, n+2, and n+4 represent the three consecutive even integers.</span>
Answer:
THANKS!!! CAN I HAVE BRAINLIEST TOOOO?!!?!?!?!
Step-by-step explanation:
Answer:
7 quarters, 8 nickels
Step-by-step explanation:
So the system of equations you have is:
x + y = 15
0.25x + 0.05y = 2.15
Here's how to solve:
first, multiply both sides of the equation 0.25x + 0.05y = 2.15 by 100 to get rid of the decimal places:
25x + 5y = 215
Then, you can divide both sides by 5 to simplify it more:
5x + y = 43
Now, you have the system of equations:
5x + y = 43
x + y = 15
Now subtract the two equations:
4x = 28
divide both sides by 4
x = 7
plug x = 7 into the equation x + y = 15 to solve for y:
7 + y = 15
subtract 7 from both sides
y = 8
So you know that there are 7 quarters and 8 nickels.
