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3 years ago

What's the percent of change for 30 to 90

1 answer:

6 0

First of all, remember that 100% is one whole thing.

Then.look at the problem, and see that 90 is three times 30.

-- 90 is 300% of an entire 30 .

-- To go from 30 to 90, you have to increase the 30 by 200% of itself.

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Daniel has 1 blue pencil and 5 yellow pencils in his backpack. He also has 2 pink erasers, 4 tan erasers, and 3 gray erasers in

Kamila [148]

First, you add up all the pencil together so there is 6 pencil then add the eraser so there 9 erasers so the answer is

pencil: 5/6 to get a yellow pencil
erasers:2/9 to get a pink eraser

5 0

3 years ago

Equations and inequalities

DerKrebs [107]

Inequalities and equations use similar steps to solve, but inequalities give a range of numbers that can represent the variable while an equation will give a direct answer.

Example:

4+5x=24

First you would subtract 4 or add the opposite of 4 from 24.

4+5x=24
+(-4) +(-4)
—————
5x=20

Then divide each side by 5 or multiply each side by the reciprocal of 5 to isolate the variable.

1/5*5x=20*1/5 (reciprocal)
X= 4

You would use the same steps in an inequality but end up with a different sign.

8 0

2 years ago

Read 2 more answers

The sum of three numbers is 123. The third number is 4 times the first. The second number is 9 more than the first. What are the

Romashka-Z-Leto [24]

Answer:

Step-by-step explanation:

Let the first number = x

Let the second number = x + 9

Let the third number = 4x

Together they make 123

x + x + 9 + 4x = 123 combine the left

6x + 9 = 123 Subtract 9 from both sides

6x = 123 - 9

6x = 114 Divide by 6

x = 114/6

x = 19

=================

First number = 19

Second number = 19 + 9 = 28

Third number = 4*19 = 76

8 0

3 years ago

What is the expected average of rolling a single die

larisa86 [58]

Answer:

Mathwords: Expected Value. A quantity equal to the average result of an experiment after a large number of trials. For example, if a fair 6-sided die is rolled, the expected value of the number rolled is 3.5. This is a correct interpretation even though it is impossible to roll a 3.5 on a 6-sided die.

Step-by-step explanation:

hope it helps

5 0

3 years ago

Read 2 more answers

A new price of an item is $39.32. The percent increase was 16%. What was the original price?

Fiesta28 [93]

Answer:

let x =the original price

then 116x/100=$39.32

116x=100×39.32

116x=3932

divide both sides by 116

116x/116=3932/116

x=33.89655

(2dp)

x=33.90

4 0

3 years ago