When are the diagonals of a rectangle equal

Which expression is equivalent to (-3y-x) - (5y-8x) A.-8y-8x B.-8y+7x C. 2y-7x D. 8y+8x

here is a list of numbers - 45,-21,-16,12 33,40. write down two numbers from the list below that have a difference of 29, work out the sum of all numbers in the list.

Which of the following is not a geometric sequence? 1,-3,9,-27,81 -7,-5.8,-4.6,-3.4,-2.2 -100 - 20 - 4, 4/5, 4/25 2.8,6.72,16.128,38.7072

Subtract t2 + 5t - 6 from t2 - 8t - 7. A) 13t - 1 B) 13t + 13 C) -13t - 1 D) -13t + 13

a shed with a pent roof need to have some new roof beams fitted. The width of the shed is 5m and the height of the pent roof is 1.3m. Work out the length of the roof beams needed to 1dp

To measure the height of the cloud cover at an airport, a worker shines a spotlight upward at an angle 75° from the horizontal. an observer at a distance d = 590 m away measures the angle of elevation to the spot of light to be 45°.

Is 223.21 is greater than 223.199

A department store is having a 30% off sale on all pairs of jeans. If you have a coupon for a dditional 15%

5*67= a. (67*10) : 2 b. (67x2) + (67*2) c. (6 * 7) * 5 d. (5*6) + (5*7)

Consider the quadratic equation below. 4x^2-5=3x+4 Determine the correct set-up for solving the equation using the quadratic formula.