Answer: x= -2, y= 3
Step-by-step explanation:
3x+5y=9
X-y=-5
Multiply bottom equation by 5
3x+5y=9
5x-5y=-25
3x + 5x=8x
5y-5y cancels out
9-25= -16
8x= -16
X= -2
Plug -2 back into equation of choice to find y
3(-2)+5y=9
-6+5y=9
Add -6 to both sides
-6+6 cancels
9+6=15
5y=15
Y=3
Answer:
27.5.
Step-by-step explanation:
These values are 5, 10, 15, 20, 25, 30, 35, 40, 45, 50.
The average = their sum / 10
= 275 / 10
= 27.5 .
The graph of the function is line A
Answer:
35% decrease is the answer
Step-by-step explanation:You get this, because if you use the equation 611-940 over 611 multiplied by 100. You do 611-940 because you need to find how much it decreased by, and then you put it over 611, because that was the total and divide, because your finding the percent by dividing the part by whole, and then multiply it by 100 to get your final answer, because 100 is the total of percentages.
Answer is x=8
Step-by-step explanation:
add up all the sides and set it equal to 20
add all the x's and constants
subtract the constant from both sides
then multiply by the reciprocal of the fraction from both sides and you'll get x