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3 years ago

I need help please 10 points

Mathematics

2 answers:

coldgirl [10]3 years ago

4 0

I know the first 3 are c. I'm pretty sure the last one is a or d

wlad13 [49]3 years ago

3 0

Answer: 7. 2n + 162 = 424

8. 3 hours

9. K ≥ 18

7. The number of Delicious apples sold is represented by n. Because they sold 162 more Empire apples than Delicious apples, the number of Empire apples sold can be represented by (n + 162). The total number of apples sold was 424, so the equation is Delicious apples + Empire apples = 424.

$n + (n + 162) = 424\\\\n + n + 162 = 424\\\\2n + 162 = 424$

8. The equation is given for this problem. Simply solve for h in the equation.

$55h + 275 = 440\\\\55h = 165\\\\h = 3$

9. The term "at least" generally means greater than or equal to. Thus, since Suzy scored at least 18 points, she scored 18 or more points.

$K \geq 18$

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By context I mean: if this the items are taken from some larger category for example: the ages of a few 'students' from a 'class'. Here 'students' are the sample from a larger set that is 'class'. The mean of the 'few students' will be called sample mean. In contrast, if we take the mean of the ages of the whole class then this is called population mean. (population mean == mean of the whole set)

In our case we aren't told exactly where these numbers come from, is this the whole set or a sample from it, the lack of context allows us to assume that the mean can either be population mean or sample mean. So we can safely use any symbol $\mu$ or $\overline{x}$ .