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LuckyWell [14K]
2 years ago
10

If

Mathematics
1 answer:
lesantik [10]2 years ago
8 0

Answer:

x = (64 + 5) ÷ 3

Step-by-step explanation:

                                        3x - 5 = 64

Add 5 to both sides:            3x = 64 + 5 = 69

Divide both sides by 3:          x = 69 ÷ 3 = 23

So the answer is x = (64 + 5) ÷ 3

Note:  If we didn't add the parentheses then using the order of operation x = 64 + 5 ÷ 3 would be x = 64 + \frac{5}{3} = 65 \frac{2}{3}

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Help please!!! asap! 10 points!
Anna11 [10]

Answer:

Fr^2/Gm_2=m_1

Step-by-step explanation:

What you do first is you have to cross-multiply so f*r^2 and 1*gm_1m_2 to get

Fr^2=Gm_1m_2. Next you will divide Gm_2 from both sides to get

Fr^2/Gm_2=m_1 as your answer.

5 0
2 years ago
When Brooklyn runs the 400 meter dash, her finishing times are normally distributed with a mean of 76 seconds and a standard dev
KonstantinChe [14]

Using the Empirical Rule, it is found that her finishing time will be between 70 and 82 seconds in 95% of her races.

<h3>What does the Empirical Rule state?</h3>

It states that, for a normally distributed random variable:

  • Approximately 68% of the measures are within 1 standard deviation of the mean.
  • Approximately 95% of the measures are within 2 standard deviations of  the mean.
  • Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, the mean is of 76 seconds and the standard deviation is of 3 seconds, then:

76 - 2 x 3 = 70.

76 + 2 x 3 = 82.

Which means that values between 70 and 82 seconds are within 2 standard deviations of the mean, hence the percentage is of 95%.

More can be learned about the Empirical Rule at brainly.com/question/24537145

3 0
2 years ago
If i read 90 pages every 30 minutes how many pages can i read in 1 minute
Katen [24]

Answer:

3

Step-by-step explanation:

.

6 0
2 years ago
Read 2 more answers
HELP PLEASE DUE IN 4 MINUTES
wlad13 [49]

Answer:

6

Step-by-step explanation:

4 0
3 years ago
Mattie Evans drove 350 miles in the same amount of time that it took a turbo propeller plane to travel 1200 miles. The speed of
frosja888 [35]

The speed of the plane will be equal to 240 Mph.

<h3>What is speed?</h3>

Speed is defined as the ratio of the time distance travelled by the body to the time taken by the body to cover the distance.

Given that:-

  • Mattie Evans drove 350 miles in the same amount of time that it took a turbo propeller plane to travel 1200 miles.
  • The speed of the plane was 170 mph faster than the speed of the car.

The speed of the plane will be calculated as:-

Let the speed of the car will be x mph so the speed of the plane will be

(x + 170)

Now time for the plane:-

Tp = Dp / Sp

Tp = 1200 / (x+170)

Now time for the car:-

Tc = Dc / Sc

Tc = 350 / x

It is given that time taken by both the plane and the car are equal:-

Tp  =  Tc

1200 / x+170 = 350 / x

1200x = 350x +  59500

850x  = 59500

x  =  59500 / 850

x  =  70mph

The speed of the plane will be calculated By:-

Sp = x + 170 = 70 + 170 = 240 Mph

Therefore the speed of the plane will be equal to 240 Mph.

To know more about Speed follow

brainly.com/question/6504879

#SPJ1

4 0
2 years ago
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