2 years ago

12 is 80% of what number

Mathematics

2 answers:

Nikolay [14]2 years ago

6 0

12 is 80% of 15. First YOU divide 12 into 80 and then you multiply by 100.

Elena L [17]2 years ago

5 0

The answer would be 12

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Read 2 more answers

a roller skating rink offers a special rate for birthday parties. On the samr day, a party for 10 skaters cost $107 and a party

olga nikolaevna [1]

Answer:

$119

Step-by-step explanation:

Let

x -----> the number of skaters

y -----> the cost for birthday parties

we have the points

(10,107) and (15,137)

step 1

Find the slope of the linear equation

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

substitute the values

$m=\frac{137-107}{15-10}$

$m=\frac{30}{5}=6\ \frac{\$}{skater}$

step 2

Find the equation of the line in point slope form

$y-y1=m(x-x1)$

we have

$m=6\\point\ (10,107)$

substitute

$y-107=6(x-10)$

step 3

Convert to slope intercept form

$y-107=6x-60$

$y=6x-60+107$

$y=6x+47$

step 4

How much would a party for 12 skaters cost?

For x=12 skaters

substitute the value of x in the equation and solve for y

$y=6(12)+47$

$y=\$119$

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2 years ago

Find the least common multiple of 9, 6, and 2.

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Answer:

Step-by-step explanation:

This is because when you find the prime factors, you can take out the ones that they have together.

In this case:

9 - 3 * 3

6 - 3 * 2

2 - 2

So notice that each number has a maximum of 2 3s and 1 2, thus, you can multiple 3 * 3 * 2

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