Answer:
Raquel collected 30 marbles
Step-by-step explanation:
If there are 80 marbles, and Raquel has collected 3/8 of them, he has collected 30
Answer:
Didn't I just do this one?
hmm
It is B btw
Answer:
24
Step-by-step explanation:
You need to plug in 3 for all of the x-values
That looks like 2(3)^2 + 5(3) - 9
Then if you simplify it is 2(9) + 15 - 9
Then simplify one last time and you get a final answer of 24
Answer:
The perimeter of rectangle is 
Step-by-step explanation:
Let
x-----> the length of the rectangle
y----> the width of the rectangle
we know that
----> equation A
---> equation B (area of the constructed figure)
substitute the equation A in equation B

using a graphing tool -----> solve the quadratic equation
see the attached figure
The solution is

Find the value of x
----> 
Find the perimeter of rectangle

Answer:
x / -9 = -16
Step-by-step explanation: