I'm taking a test and need answers !

○ c) 1152 cm.²

○ b) 115 cm.²

○ a) 21 in.²

○ c) 256 in.²

step-by-step explanation:

{a}^{2} + 2a \sqrt{\frac{ {a}^{2}}{4} + {h}^{2}} = s. a. [square pyramid]

* so, what happened here was that whenever you have squares under the radical, you undo the square root, causing the radical to vanish, so with that, you have your answer.

square prisms [cubes] and rectangular prisms

i am joyous to assist you anytime.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x