Answer:
D. 28.26 in²
Step-by-step explanation:
Area of a circle= πr²
r= 3
π= 3.14
A= (3.14)(3)²
A= 28.26 in²
Answer:
The amount that William has at the beginning is $37.50 and the amount that Gracie has at the beginning is $52.50
Step-by-step explanation:
Let
x ---> amount that William has at the beginning
y ---> amount that Gracie has at the beginning
we know that
William says to Gracie, "If you give me $7.50,we will have and equal amount of money
so

----> equation A
"Grace responds, if you give me $ 7.50 instead, I will have twice as much money as you


----> equation B
substitute equation A in equation B

solve for x

Find the value of y

therefore
The amount that William has at the beginning is $37.50 and the amount that Gracie has at the beginning is $52.50
The mean is 2.5. also there is mean, median, mode calculators online to help you with these in the future
There are 25 students.
Let g = girls, and b = boys
g = 1/2b + 10
g + b = 25
Plug in 1/2b + 10 for g
(1/2b + 10) + b = 25
3/2b + 10 = 25
isolate the b, subtract 10 from both sides, and then multiply by 2/3
3/2b + 10 (-10) = 25 (-10)
3/2b = 15
(3/2b)/(2/3) = 15(2/3)
b = 30/3
b = 10
Subtract 10 from 25 to get the number of girls
25 - 10 = 15
g = 15
There are 10 boys in the class.
hope this helps
Answer:
3x - 7
Step-by-step explanation:
(f - g)(x)
= f(x) - g(x)
= 4x - 3 - (x + 4)
= 4x - 3 - x - 4 ← collect like terms
= 3x - 7