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3 years ago

Johnathan can jog 3 2/5 miles in 7/8 hour. Find his average speed in miles per hour

Mathematics

1 answer:

tankabanditka [31]3 years ago

8 0

Your answer is 39/13 miles per hour

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What is the solution to 3|–3x + 9| = –18?

Natasha_Volkova [10]

3|–3x + 9| = –18

divide both sides by 3

|–3x + 9| = –6

absolute value cannot be a negative number

Answer: No solutions

4 0

3 years ago

Find the average rate of change for f(x)=-4x² over the interval -4≤x≤-2. Enter your answer as a number. *

Soloha48 [4]

Answer:

Step-by-step explanation:

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3 years ago

Last year, lien earned 1200 more than her husband. Together they earned 45,200. How much did each of them earn?

nasty-shy [4]

Husband earned 22,600
lien earns 23,800

8 0

2 years ago

Harry and Lisa Perry have agreed to pay for their granddaughter’s college education and need to know how much to set aside so an

Jobisdone [24]

Answer:

$117,836.49

Step-by-step explanation:

We can't make heads or tails of your table, so we have used a financial calculator to determine the multiplier is about 4.713. The calculator maintains more significant digits than that, so gives the value to the penny as ...

$117.836.49

_____

This value is about 4.71345951 × $25,000.

7 0

3 years ago

In a sample of n = 6 scores, 5 of the scores are each above the mean by one point. Where is the 6th score located relative to th

den301095 [7]

The mean of a dataset is the sum of all data elements divided by the count of the elements.

The location of the 6th score relative to the mean is 5 points below the mean

Let:

$\bar x \to$ Mean

$a \to$ 5 scores

$b \to$ 6th scores

Given that:

$n = 6$

The 5 scores that are 1 above the mean implies that:

$a = \bar x + 1$

The mean of a dataset is calculated using:

$\bar x = \frac{\sum x}{n}$

So, we have:

$\bar x =\frac{5a + b}{6}$

$\bar x =\frac{5(\bar x + 1) + b}{6}$

Open brackets

$\bar x =\frac{5\bar x + 5 + b}{6}$

Multiply both sides by 6

$6\bar x =5\bar x + 5 + b$

Make b the subject

$b = 6\bar x -5\bar x - 5$

$b = \bar x - 5$

This means that the 6th score is 5 points below the mean