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3 years ago

10

Debbie studies for 12.5 hours, John studies for 6 hours, and Ashley studies for 1.5 hours. what is the average number of hours t

he 3 students study?

1 answer:

ale4655 [162]3 years ago

6 0

you can answer it six point six six six six six infinity or you can answer it 6.7 depending upon how they want

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The length of a side of an equilateral triangle is 40cm. what is the length of the altitude of the triangle?

podryga [215]

Answer:

20√3 cm

Step-by-step explanation:

Altitude of an equilateral triangle splits it into 2 equal right triangles, it bisects the base and the angle opposite to the base.

<u>Let the altitude be x. Then as per Pythagorean theorem:</u>

x² = 40² - (40/2)²
x²= 1600 -400
x²= 1200
x= √1200
x= 20√3 cm

<u>Correct choice is</u> the second one

4 0

3 years ago

Please help me I honestly have zero clue how to answer this question

Iteru [2.4K]

Step-by-step explanation:

$n = 3 \times 5 {}^{2} \times {x}^{3}$

Square both sides of the equation.

${n}^{2} = (3 {}^{2} \times 5 {}^{4} \times {x}^{6} )$

$5 {n}^{2} = 5(3 {}^{2} \times {5}^{4} \times {x}^{6} )$

6 0

2 years ago

Which is bigger 7.79 or .99

lord [1]

7.79 is larger than .99

6 0

3 years ago

Read 2 more answers

Solve: x/x+2 + 5/x-3 = 25/x2-x-6

Paraphin [41]

Answer:

x1=3 x2=-5

BUT x1=3 is not an answer because it doesnt respects the range on the original ecuation, so x2=-5 is the solution

Step-by-step explanation:

6 0

2 years ago

The expression on the left side of an equation is show below

max2010maxim [7]

Answer:

−4(x−2)+5x

Distribute:

=(−4)(x)+(−4)(−2)+5x

=−4x+8+5x

Combine Like Terms:

=−4x+8+5x

=(−4x+5x)+(8)

=x+8

8 0

3 years ago