3 years ago

Please help mememememememememmeemem

Mathematics

1 answer:

Feliz [49]3 years ago

5 0

Answer: D

The answer is ( 7, )

Step-by-step explanation:

Set the equations equal to each other. 3x - 28 = -3x + 14

Bring values over. 3x (+3x) - 28 = -3x + 14 (+28)

Add values together. 6x = 42

Divide by 6. x = 7

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A rectangular prism has a base of 18 cm by 15 cm and a diagonal of 25 cm. Identify its height. Round to the nearest tenth. HELP

jok3333 [9.3K]

Answer:

8.7 cm

Step-by-step explanation:

You know the relationship between the diagonal of a rectangular prism and the sides as $d^2 = x^2 + y^2 + z^2$ where x, y and z are the three dimensions of the prism. from your data, $25^2 =18^2 + 15^2 + z^2$ or $z^2 = 25^2 -18^2 - 15^2$ . With some simple calculation you get $z^2 = 625 - 324 - 225 = 76$ , or $z= 8.7178....$