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2 years ago

14

A student started out poorly on his first mathematics test. However, he doubled his score on each of the next two tests. The thi

rd test grade was 100. What was the student’s average test grade? Round to the nearest tenth.

1 answer:

dsp732 years ago

6 0

His score is 50

How to:
First test grade:0
Second test grade:50
Third test grade: 100
Add all three and divide by 3

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\frac{3}{10} = \frac{x}{x + 2}103=x+2x

a_sh-v [17]

7 because the way its set up

3 0

3 years ago

What is 9 to the power of -3

larisa86 [58]

Answer: 1/729

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3 0

2 years ago

oksano4ka [1.4K]

It took him 9.92 hours to complete the journey.

Step-by-step explanation:

Given,

Distance traveled = 50 miles

Distance traveled on horse = $\frac{50}{2}=25\ miles$

Distance traveled on foot = 25 miles

Speed while riding = 9 miles per hour

Distance = Speed * Time

Time while riding = $\frac{Distance}{Speed}$

Time while riding = $\frac{25}{9}=2.78\ hours$

Speed while waling = 3.5 miles

Time = $\frac{25}{3.5}=7.14\ hours$

Total time = 2.78+7.14 = 9.92 hours

It took him 9.92 hours to complete the journey.

Keywords: speed, distance

Learn more about distance at:

#LearnwithBrainly

7 0

2 years ago

Solve for x 2x^2 = 128<br><br> Answers <br> -6 and 6 <br> -8 and 8<br> -32 and 32 <br> -64 and 64

uysha [10]

Divide both sides by 2

x^2 = 128/2

Simplify 128/2 to 64

x^2 = 64

Take the square root of both sides;

x = √64

Since 8 * 8 = 64, the square root of 64 is 8

<em>x = -8 and 8</em>

<u>Answer: B -8 and 8</u>

8 0

2 years ago

Goryan [66]

Answer:

1,451.61 cm²

Step-by-step explanation:

A = LW

A = 38.1 x 38.1 (since a checkerboard has to be square)

A = 1,451.61

8 0

2 years ago