If x-y=10 and x+y=20 what is the answer for x^2-y^2?

The rectangular bird sanctuary with one side along a straight river is to be constructed so that it contains 8 km2 of area. Find the dimen - sions of the rectangle to minimize the amount of fence necessary to enclose the remaining three sides.

Find two positive numbers satisfying the given requirements. the product is 156 and the sum is a minimum.

Which expression is equivalent to 16^3? a. 2^7 b. 2^11 c. 2^12 d. 2^64

What is the value of u+v+w when u = - 10, v = 4, and w = 8? a. - 22 b. 2 c. 14 d. 22

What is 378 times by 9

What is the answer to 7+6 / (-7+9) ^2

What is the greatest possible error for a measurement of 25 gallons

Maya uses blue and orange fabric to make identical wall decorations. The graph below shows the relationship between the amounts of blue and orange fabric used. (0.7, 0,3). What is the constant of proportionality? A:3/10, B:2/5, C: 3/7, D:1/2.

To be considered similar similar, two polygons must have corresponding side that are what?

Determine which of the following pairs of events are dependent. a) A: It rains today. B: Your favorite television show is on. b) A: You cook your chicken improperly. B: You get salmonella poisoning. c) A: The power goes out.