2 years ago

What is a way to use the properties of similar triangles to find measurements

Mathematics

1 answer:

muminat2 years ago

8 0

Use proportions and use letters for unknown measurements

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Sladkaya [172]

The awnser for question 5 is 4/6

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2 years ago

The number of sticks of gum varies directly as the number of packages. There are 36 sticks of gum in 2 packages. Suppose you hav

tangare [24]

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Each packet gives you 18 sticks of gum. If you asked how many in 5 packets it would be 90 sticks.

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2 years ago

Complete the table with the number of sit-ups you have to do sunday so that the mean number of sit-ups per day is 100

marissa [1.9K]

The mean is the average of the numbers.

It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

Let the number of sit-ups you have to do Sunday be x. Then the sum of all sit-ups is

100+65+120+150+90+0+x=525+x.

The number of days is 7.

Thus, the mean is

$\text{mean}=\dfrac{525+x}{7}.$

You know that the mean number of sit-ups per day is 100, equate these two means and solve the equation:

$\dfrac{525+x}{7}=100,\\ \\525+x=700,\\ \\x=700-525,\\ \\x=175.$

Answer: 175 sit-ups

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3 years ago

A wagon is on sale for 20% off. The sale price of the wagon is $114. What was the original price of the wagon, assuming no sales

Sphinxa [80]

The 114 represents 80% of the total price before the sale. You would set up your equation as

Cost Price * 80% = Sale Price.

Sale Price = 114

80% = 80/100 = 0.8

Cost Price = 114/0.8

Cost Price = 142.50 which is the price before the deduction. You can confirm this by taking 20% of 142.50 and subtracting it form 142.50

20% * 142.50

20/100 * 142.50

2850/100

28.50

Now subtract 28.50 from 142.50

142.50 - 28.50 = 114 which is just what you might expect.

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3 years ago

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Which expression has a positive value?<br> O (-5)(-9)<br> O 2-4<br> O 12+(-4)<br> O-3+(-7)

PolarNik [594]

(-5)(-9) because a negative times a negative equals a positive.

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2 years ago

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