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3 years ago

10

At 5:00 a.M., the temperature outside was 1°F below zero. By noon, it rose by 12°F. At 7:00 p.M., the temperature dropped by 6°F

. What was the evening temperature? Question 2 options: -19°F 5°F 14°F -5°F

1 answer:

denpristay [2]3 years ago

7 0

Answer:

7

Step-by-step explanation:

1+12-6=7

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15 students preordered the year book and 9 students paid full price.

<u>Solution: </u>

Given that

Cost of pre-ordered year book = $\$38$ each

Cost of full price of year book = $\$45$ each

Number of students in Mr. Hillman's class purchased yearbooks = 24

Total price spent by 24 students to purchase year book = $\$975$

Need to determine number of students pre-ordered and number of students paid full price.

Let assume number of student pre-ordered year book = x

As out of 24, x students pre-ordered the yearbook , so remaining are the ones who paid full price

So number of students paid full price = $24-x$

Money spent by students who pre-ordered the book = number of student pre-ordered year book multiplied by Cost of 1 pre-ordered year book = $x\times38 = 38x$

Money spent by students who paid full price = number of students paid full price x Cost of 1 full price year book = $(24-x)\times 45 = 1080-45x$

Total price spent by 24 students to purchase year book = Money spent by students who pre-ordered the book + Money spent by students who paid full price

$\Rightarrow 975=38 x+1080-45 x$

On solving above expression for x, we get

$\begin{array}{l}{\Rightarrow 975-1080=38 x-45 x} \\\\ {\Rightarrow-105=-7 x} \\\\ {\Rightarrow \frac{-105}{-7}=x} \\\\ {\Rightarrow x=15}\end{array}$

Number of student pre-ordered year book = $x=15$

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Hence 15 students pre-ordered the year book and 9 students paid full price.

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