I need help with adding fractions

Answers

Answer 1

Answer: Only the numerators are added if both has the same denominator. But if they have different denominators, all you have to do is find the smallest multiple of both numbers, so you multiply by whatever to get that on both the numerator and denominator.

Answer 2

Answer:

Answer:

Step 1: Make sure the bottom numbers (the denominators) are the same.

Step 2: Add the top numbers (the numerators), put that answer over the denominator.

Step 3: Simplify the fraction (if needed)

Step-by-step explanation:

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A 120-watt light bulb uses about 0.1 kilowatt of electricity per hour. If electricity costs $0.20 per kilowatt hour, how much does it cost to have the bulb on for an hour?

Answers

There is no such thing as a "kilowatt per hour". If that's actually what the question says, then it's a defective question, and you should put it away before it makes you any more confused. A 120 watt light bulb uses exactly 0.12 kilowatt when it's turned on. In one hour, it uses (0.12 kilowatt) x (1 hour) = 0.12 kilowatt-hour of energy. If energy costs $0.20 per kilowatt-hour, then the cost is (0.12) x (0.20) = 2.4 cents. (0.024 dollar)

Mrs. Cleaver mixes 1.24 liters of red paint with 3 times as much blue paint to make purple paint. She pours the paint equally into 5 containers. How much BLUE paint is in each container? Give your answer in liters.

Answers

The amount of blue paint in each container is $\fbox{\begin\n\ 0.744 liters \end{minispace}}$ .

Further explanation:

The mixture mixed by Mrs. Cleaver contains 1.24 litres of red paint with 3 times blue paint to obtain purple paint.

So, the amount of blue paint is calculated as,

${3} * {1.24}=3.72 \text { liters}$

Therefore, the total amount of paint mixture is the sum of blue paint and red paint.

$\fbox{\begin \n\begin{aligned} \text{Total paint}= 1.24+3.72\n=4.96 \text{ liters}\n\end{aligned}\n\end{minispace}}$

Now, as Mrs. Cleaver divides the paint mixture equally in 5 containers so the amount of paint in one container is calculated as,

$\boxed{\begin{aligned}\text{Amount of paint in one container}&= (4.96)/(5)\n &=0.992 \text{ liters} \end {aligned}}$

Since amount of blue paint mixed is three times the red paint so the fraction of blue paint to the total paint is $(3)/(4)$ .

Now, as it is known that the fraction of blue paint to the total paint is $(3)/(4)$ and the amount of paint in a container is $0.992 \text{ liters}$ then the blue paint in one container is calculated as,

$\boxed{\begin{aligned}\text{Blue paint in one container} =(3)/(4) * 0.992\n=0.248 \text{ liters}\end{aligned}}$

Thus, the amount of blue paint in each of the five containers is $\fbox{\begin\n\ 0.744 liters \end{minispace}}$ .

Learn more:

1. To solve one variable linear equation brainly.com/question/1682776

2. Linear equation application brainly.com/question/2479097

3. Composite functions brainly.com/question/2142762

Answer details

Grade: Middle school

Subject: Mathematics

Chapter: Mixtures and ratios

Keywords: mixture, paint, red paint, blue paint, Mrs. Cleaver, purple paint, fraction, each container, five containers, divides, times, equally divide, mixes, liters.

.744 liters
hope this helped :D

3.72/5 = .744 liters

How do you write 3/5 as a percentage?

Answers

60% Thats all just writing so i can post

To find out, you need to turn the denominator to 100, so multiply the top and bottom of 3/5 by 20.

60/100

Therefore 3/5 as a percentage is 60%

Factor the following quadratics completely

Answers

The fully factored form of the quadratic is (2r - 7)(r + 6).

2r^2 + 5r - 42

Check if splitting the middle term is possible.

List factors of -84

1 * -84

-1 * 84

2 * -42

-2 * 42

3 * -28

-3 * 28

4 * -21

-4 * 21

6 * -14

-6 * 14

7 * -12

-7 * 12 (these digits satisfy the criteria.)

Split the middle term.

2r^2 + 12r - 7r - 42

Factor by grouping.

2r(r + 6) - 7(r + 6)

Rearrange.

(2r - 7)(r + 6)

5.2 more than the product of seven and a number

Answers

5.2+7*n i think im right

It's 7•n+5.2 ------------

What is the distance between points (4, −7) and (−5, 9)? Round to the nearest tenth of a unit.

_______ units

5.7?

Answers

squareroot of 337 which is about 18.35 units

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