A student wants to use the property (x - y) (x + y) = (x2 - y2) to find the product (26)(34). Which statement is true? The student should let z = 30 and y=2, then the product (26)(34) is 60 – 4.
The student should let I = 30 and y=2, then the product (26) (34) is 900 - 8.
The student should let I = 30 and y = 4, then the product (26) (34) is 60 - 8.
The student should let x = 30 and y = 4, then the product (26) (34) is 900 - 16.

How do you solve a question like this?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14