I’ve provided both the answer and explanation below! Hope this helps :)
Answer:
x = ±2sqrt(15)
Step-by-step explanation:
x^2 = 60
Take the square root of each side
sqrt(x^2) = ±sqrt(60)
x = ±sqrt(60)
x = ±sqrt(4 *15)
x = ±2sqrt(15)
Answer:
def b
Step-by-step explanation:
Answer: There were 78 red apples at the party.
Step-by-step explanation:
This situation can be represented by the equation
x + 3x + 2(3x) = 130 where x is the number of green apples, 3x is the number of yellow apples and 2(3x) is the number of red apples.
Now solve for x
x +3x +2(3x) =130
4x + 6x = 130
10x = 130
x = 13
Now we know that x is 13 so put it into the expression for red apples and solve for the actual number of red apples.
2 * (3*13) = ?
2 * 39 = 78
The area of a circle is \pi r^2, where r is the radius of the circle. The diameter of a circle is the length of a line that passes through the center of the circle and stops at the perimeter of circle. The radius of a circle is half the diameter. Divide the diameter by 2 to find the radius.
1. 2.8 m / 2 = 1.4 m
2 .
![\pi (1.2m)^2](https://tex.z-dn.net/?f=%20%5Cpi%20%281.2m%29%5E2%20)
: Plug in the value we just found for r.
3.
![\pi 1.44m^2](https://tex.z-dn.net/?f=%5Cpi%201.44m%5E2)
: Use the order of operations (PEMDAS).
4.
![\pi * 1.44m^2 = ~4.52 m^2](https://tex.z-dn.net/?f=%5Cpi%20%2A%201.44m%5E2%20%3D%20~4.52%20m%5E2)
The area of the circle is equal to