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3 years ago

Brad walked a total of 7/8 of a mile. Brad walked 3/4 of a mile when it was raining. How far did Brad walk when it was sunny?

Mathematics

1 answer:

RideAnS [48]3 years ago

4 0

Answer:

1/8

Step-by-step explanation:

assuming that the rest of what brad walked was sunny

7/8 - 6/8(3/4) = 1/8

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Alex scored 98,72, and 87 on his first three math test. What must he score on the next test to have an average of at least 86 (P

ss7ja [257]

Answer:

$\huge\boxed{\text{At least an } 87\%}$

Step-by-step explanation:

In order to find what score Alex must earn to have an average of 86 on all his tests, we need to first note what the formula to find the average of a data set is.

$\displaystyle \frac{x_1+x_2+...x_n}{n}$

What the formula means is that we have to add up all the values then divide by the total number of values.

Let's represent our unknown number as $x$ .

$\displaystyle \frac{98+72+87+x}{4} \geq 86$ (since we want AT LEAST an 86).

Let's solve this inequality for x.

$\frac{98+72+87+x}{4} \cdot 4 \geq 86 \cdot 4$
$98+72+87+x \geq 344$
$257 + x \geq 344$
$257 + x - 257 \geq 344 - 257$
$x \geq 87$

So, Alex must score at least an 87% on his next quiz to have an average of 86%.

Hope this helped!

8 0

3 years ago

How long will it take for an investment to triple, if interest is compounded continuously at 4%?

Margaret [11]

3p=pe^tr,,3=e^0.04t ,,then use log to find t

3 0

3 years ago

Plot the x- and y-intercepts to graph the equation. y=−12x−3

Lisa [10]

X-intercept; -.25
y-intercept; -3

8 0

3 years ago

Read 2 more answers

Sean made 3⁄4 pound of trail mix and put 3⁄8 pound in each bag. How many bags did Sean fill with trail mix?

ddd [48]

Answer:

It is 2 bags.

Step-by-step explanation:

You have to divide 3/4 and 3/8. The 3/4 goes first.

5 0

3 years ago

In Mr. Romero's auto shop class, the ratio

MrMuchimi

Answer:

boys 5:2 girls

add the ratio parts together

5 + 2 = 7

divide the total number of students by the total number of parts

35/7 = 5

now multiply each part of the ratio by 5

boys 25

girls 10

there are 25 boys

5 0

3 years ago