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Marianna [84]
3 years ago
8

Two angles are complementary angles. If one of the angles is 2n – 7 and

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
8 0

Answer: The answer would be 32.333 (goes on)

Step-by-step explanation:

2n-7 + n = 90

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John is filling a bathtub that is 18 inches deep. He notices it takes 2 mins. To fill the tub 3 inches of water. He estimates it
Pavel [41]

Depth of the bathtub = 18 inches

Time taken to fill 3 inches of the bathtub = 2 minutes

Then

The amount of depth needed to fill with water = (18-3) inches

                                                                        = 15 inches

Time required to fill 15 inches of the bathtub = (15*2)/3 minutes

                                                                      = 30/3 minutes

                                                                      = 10 minutes

So John is correct in thinking that it will take 10 more minutes for the water to reach the top of the tub if he continues at the same rate.

Hope this helps!

6 0
3 years ago
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The area of triangle ABC is 31 1/4 square centimeters. What is the measure of b?
Zigmanuir [339]

Answer:

102 cm

Step-by-step explanation:

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3 years ago
Which of the following is one of the Mound Builders' cities that disappeared?
BabaBlast [244]

Answer:

Your answer is Cahokia. Hope this helps plz mark brainliest! Have a great day!

Step-by-step explanation:

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3 years ago
What is the y-intercept of a line perpendicular to y=1/2x + 6 that passes through the point (4,-3)
SCORPION-xisa [38]

Answer:

(0,5)

Step-by-step explanation:

Perpendicular lines have slopes which are negative reciprocals of each other. The slope of the line y=1/2x + 6 is 1/2. The slope perpendicular to it is -2.

Using m=-2, substitute it and (4,-3) into the point slope form and simplify to find the y-intercept.

y-y_1 = m(x-x_1)\\y--3=-2(x-4)\\y+3=-2(x-4)\\y+3=-2x+8\\y=-2x+5

The equation is now in slope intercept form y=mx+b and b is the y-intercept. The y-intercept of y=-2x+5 is (0,5).

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3 years ago
6. A prism has bases that are equilateral triangles with sides lengths of 10 inches and a length of 30 inches.
vova2212 [387]

Answer:

The volume of the prism is 1,299\ in^{3}

Step-by-step explanation:

we know that

The volume of the prism is equal to

V=BL

where

B is the area of the triangular base

L is the length of the prism

we have

L=30\ in

<em>Find the area of the base B</em>

The area of a equilateral triangle is equal to

B=\frac{1}{2}(10)^{2} sin(60\°)

B=25\sqrt{3}\ in^{2}

substitute

V=(25\sqrt{3})(30)=1,299\ in^{3}

4 0
3 years ago
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