How is a²-4a-21 expressed in factored form?

(x-1) (x+21)

(x-21) (x+1)

(a-7) (a+3)

(a-3) (a+7)

Which of the following represents the standard form of the linear equation below? I = {y+12 Select one: O A. I - 3y = - 36 O B. 32 - y=36 oc. jt - y=-36 O D. 3y=+36

A circular hot tub located near the middle of a rectangular patio has a diameter of 48 inches. The patio measures 11 feet by 6 feet. What is the area of the patio that is not covered by the hot tub? Round to the nearest tenth.

One foot is equivalent to approximately 0.3048 meters. if a building is 65-feet long, what is the length of the building in meters, to the nearest tenth?

What is 8b2 - 8 factored?

A triangle has side lengths of 10,24and 30 what type of triangle is it

Calculate the circumference of a circle with radius of 5cm

A ladder leans against a building. The angle of elevation of the ladder is 70°. The top of the ladder is 25 ft from the ground. To the nearest tenth of a foot, how far from the building is the base of the ladder? 20.5 ft 30.5 ft 32.3 ft 39.5 ft

First day I read 1/4 of a novel, second day I read 1/2 of the remaining pages. On the third day I read the remaining 108pages. How many pages are in the novel.

Carmen bought a plant that is 4 centimeters tall. Each Week the plant grows an additional 2 centimeters. Write an expression to show the height of the plant after W weeks

Find the discriminant 2x^2+8x+8=0