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3 years ago

10

when you're dividing fractions you only flip the numbers around and multiply them if the numerator is higher than the denominato

r right?

1 answer:

Whitepunk [10]3 years ago

6 0

Answer:

Step-by-step explanation:

Actually, when dividing fractions, you always flip the second fraction and multiply, no matter the size of the numerator or denominator.

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Isabel found 54 coins at the bottom of her backpack. when she looked, she noticed they were only nickels and dimes. Isabel count

goblinko [34]

She had 23 nickles and 31 dimes

Step-by-step explanation:

The given is:

Isabel found 54 coins at the bottom of her backpack
She noticed they were only nickels and dimes
Isabel counted the coins and they totaled $4.25

We need to find how many nickels and dimes she had

Assume that the number of nickels is x and the number of dimes is y

∵ Isabel had 54 coins

∵ The number of nickels is x

∵ The number of dimes is y

∴ x + y = 54 ⇒ (1)

∵ 1 nickle = 5 cents

∵ 1 dime = 10 cents

∵ The coins totaled $4.25

- Change the dollars to cents

∵ 1 dollar = 100 cents

∴ $4.25 = 4.25 × 100 = 425 cents

- Multiply the number of nickles by 5 and the number of dimes

by 10, add the two products and equate the sum by 425

∴ 5x + 10y = 425 ⇒ (2)

Now we have a system of equations to solve it

Multiply equation (1) by -10 to eliminate y

∵ -10x - 10y = -540 ⇒ (3)

- Add equations (2) and (3)

∴ -5x = -155

- Divide both sides by -5

∴ x = 23

Substitute the value of x in equation (1) to find y

∵ 23 + y = 54

- Subtract 23 from both sides

∴ y = 31

She had 23 nickles and 31 dimes

Learn more:

You can learn more about the system of equations in brainly.com/question/6075514

#LearnwithBrainly

6 0

3 years ago

Leilani practiced piano for 3/5 of an hour. Sarah practiced piano for 7/8 of an hour.

ivolga24 [154]

Answer:

The number of hours did Sarah practice more than Leilani is $\dfrac{11}{40}$ hours .

Step-by-step explanation:

Given as :

The time for which Leilani practiced piano = $\dfrac{3}{5}$ hours

The time for which Sarah practiced piano = $\dfrac{7}{8}$ hours

Let the number of hours did Sarah practice more than Leilani = T hours

<u>Now, According to question</u>

The number of hours did Sarah practice more than Leilani = $\dfrac{7}{8}$ hours - $\dfrac{3}{5}$ hours

Or, T = $\dfrac{35-24}{40}$ hours

Or, T = $\dfrac{11}{40}$ hours

So,The number of hours did Sarah practice more than Leilani = T = $\dfrac{11}{40}$ hours

Hence, The number of hours did Sarah practice more than Leilani is $\dfrac{11}{40}$ hours . Answer

3 0

3 years ago

Can anyone help ASAP , thank you .

Phoenix [80]

Multiply it out.

I believe the answer would be 15x^2 - 20x.

However, functions is not my forte.

Soooo

yeah

3 0

2 years ago

Read 2 more answers

Help me! What is the answer to this question!? Provide a step by step explanation please.

zmey [24]

Answer:

x = -5 or x= 2

Step-by-step explanation:

|-4x-6| = 14

There are two solutions, one positive and one negative

-4x-6 = 14 -4x-6 = -14

Add 6 to each side

-4x-6+6 = 14+6 -4x-6+6 = -14+6

-4x = 20 -4x = -8

Divide by -4

-4x/-4 = 20/-4 -4x/-4 = -8/-4

x = -5 x = 2

3 0

3 years ago

Read 2 more answers

Simplify negative 9 over 6 divided by 3 over negative 2. . (5 points) a 3 b 1 c −1 d −3

vladimir2022 [97]

Answer:

b) 1

Step-by-step explanation:

$\frac{9}{6} \times \frac{2}{3} = \frac{18}{18}$

$\frac{18}{18} = 1$

6 0

3 years ago