Is this all the information that you have
Answer:
x = 2 or x = -2
Step-by-step explanation:
7x^2 - 28 = 0
7x^2 = 28
x^2 = 28/7 = 4
x = root(4) or x = -root(4)
x = 2 or x = -2
Answer:
(1,4)
Step-by-step explanation:
When replacing X and Y with the values (1,4)
AND 
Therefore, (1,4) is correct
Multiply both sides of the equation by 1/4, because in order to be able to complete the square the first coefficient must be 1. :)
Answer:
125/64=1(61/64) inch
Step-by-step explanation:
The complete thickness would be the sum of individual thickness in the array.
The cooper would be the upper layer with 3/4 inch thick, the support is the middle layer composed by three sublayers: 1/64 inch mica, 2 pieces of fiber of 1/8 inch each (2/4 inch both) and a pressboard with 1/16 inch thick. The bottom layer is the support with 7/8 inch thick.
The sum would be:
