Suppose there are 12 equal parts of the house to be cleaned. Max can do 1 per hour, and Maggie can do 3 per hour.

The number of units they can do together in x hours is x+3x. Since there are 12 units to do, x+3x=12. For x=3 this is true, so the sister was right!

4 0

3 years ago

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The right rectangular pyramid shown below has a square base. What shape is the cross section?

goblinko [34]

The cross section is a trapezoid.

8 0

3 years ago

If mBGC = 16x - 4 and mCGD = 2x + 13, find the value of x so that BGD is a right angle

Lelu [443]

Hi there! :)

Answer:

$\huge\boxed{x = 4.5}$

m∠BGC = 16x - 4

m∠CGD = 2x + 13

m∠BGC + m∠CGD sums up to 90°, therefore:

(16x - 4) + (2x + 13) = 90

Combine like terms and simplify:

16x + 2x - 4 + 13 = 90

18x - 4 + 13 = 90

18x + 9 = 90

18x = 81

18x/18 = 81/8

x = 4.5

5 0

2 years ago

and what the length of the ramp between the building is _______ feet. (round to the nearest tenth of a foot)

nirvana33 [79]

Answer:

i. think. its. c.

5 0

3 years ago