3 years ago

Write an algebraic expression to represent: three times a number minus seven.

Mathematics

1 answer:

faltersainse [42]3 years ago

5 0

Answer:

3•x-7

Step-by-step explanation:

I hope that helps!

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2 years ago

A pyramid has a square base and a height of 6 ft. The volume of the pyramid is 162 ft^3. Let s be the length of a side of the py

geniusboy [140]

Answer:

$(a)s^2\\(b)162=2s^2\\(c)s=9$ ft$

Step-by-step explanation:

(a)Base Area

Side length of square base=s

Area of a Square of side length s= $s^2$ ft^2$

(b)

Height =6 ft
Volume= $162 $ ft^3.$

Volume of a Pyramid $=\frac{1}{3}X$Base Area X Height$

Substituting the given values, we have:

$162=\frac{1}{3}Xs^2 X 6\\\\162=2s^2$

(c)Solving the equation derived from (b)

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3 years ago

A mosaic is made from 25 pieces each piece is a parallelogram as shown in the figure what is the total area of the mosaic?

den301095 [7]

Answer:

Step-by-step explanation:

Unless there is something special about this, the answer is 25 times the area of 1 parallogram.

Area of 1 parallelogram = Base * Height

Base = B = 5.3 cm

Height = H = 3.3 cm

Area = B*H

Area = 5.3 * 3.3

Area = 17.49

There are 25 pieces.

Total Area = 25 * 17.49

Total Area = 437.25 cm^2

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3 years ago