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3 years ago

How many times can 2 1/2 be subtracted from 12 1/2

Mathematics

2 answers:

barxatty [35]3 years ago

7 0

12.5 divides by 2.5 will give you 5

Luba_88 [7]3 years ago

5 0

2 1/2 = 2.5
12 1/2 = 12.5

This means you can calculate how may times it goes in by dividing it and rounding the number down:

12.5 / 2.5 = 5

*5 can not be rounded down so it stays the same

This means that 2 1/2 goes into 12 1/2 5 times. Hope this helps! :)

You might be interested in

70 decreased by 13% =

Pie

If you have a calculator:
1) To find 1%, divide by 100 (70 / 100 = 0.7) 

2) Then, multiply by the % you need (0.7 x 13 = 9.1) 

Therefore 70 - 9.1 = 60.9 

If you don't have a calculator: 
1) Find 50%, 10%, 5%, and 1%. With these, you can make any % you need. 
50% = X / 2 (= 35) 
10% = X / 10 (= 7) 
5% = first, do 10%, then divide that by 2 (= 3.5) 
1% = X / 100 (= 0.7) 
Where X is the number you want to work out % for 

2) Add those % up to get the amount you want 
10% + 1% + 1% +1% = 13% 
7 + 0.7 + 0.7 + 0.7 = 9.1 

Therefore 70 - 9.1 = 60.9
Hope that helps :)

7 0

3 years ago

What is 20% of 120? Select one O O O 20 240

balandron [24]

20% of 120 can be represented as 120 * 0.20
120 * 0.20 = 24

so 20% of 120 is 24

5 0

3 years ago

20 POINTS!!!!!

Rom4ik [11]

Answer:

5/the number of socks he has

8 0

2 years ago

In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi

lana [24]

Answer:

Confidence interval: (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

$\bar{x} = 1858 \text{ kWh}$

Population standard deviation =

$\sigma = 450 \text{ kilowatt-hours}$

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

$\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

$1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)$

6 0

3 years ago

What is the goal in solving an equation?

Lelechka [254]

Your answer is, get the variable by itself.

The goal in solving an equation is to get the variable by itself on one side of the equation and a number on the other side of the equation. To isolate the variable, we must reverse the operations acting on the variable. We do this by performing the inverse of each operation on both sides of the equation.

<h3>What is an equation?</h3>

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =

<h3>3 types of equations</h3>

slope-intercept form

point-slope form

standard form

Thus, option a is your answer.

Learn more about equations here

https://brainly.in/question/5052814

4 0

2 years ago