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miv72 [106K]
3 years ago
6

7. The cost of 2 notebooks and 4 folders is

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
5 0

Answer: B (The cost of a notebook is $0.75, and the cost of a folder is $0.25.)

Step-by-step explanation:

No need for explanation. i know i’m right!!

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You want to solve 11% of what number is 22. Explain how you can solve that by using a proportion
Doss [256]
Write the first ratio as 11/100 and set it equal to 22/n.

since 11 x 2=22 you can multiply 100 x 2 and you'll get 200. 

*Check*: 11% of 200=22
3 0
3 years ago
A scientist has two solutions, which she has labeled Solution A and Solution Each contains salt. She knows that Solution A is 40
Alexxandr [17]

Answer:

Step-by-step explanation:

Let the number of ounces of

A = x

B = y

A scientist has two solutions, which she has labeled Solution A and Solution Each contains salt. She knows that Solution A is 40% salt and Solution B is 55% salt. She wants to obtain 90 ounces of a mixture that is 45% salt. How many ounces of each solution should she use?

Our system of equations is given as

x + y = 90.... Equation 1

x = 90 - y

40% × x + 55% × y = 45% × 90 ounces

0.4x + 0.55y = 40.5....Equation 2

We substitute 90 - y for x in Equation 2

6 0
3 years ago
Solve for b.<br><br> + b = -1<br><br> b = <br> 10
True [87]

Answer: B= -11

Step-by-step explanation:

math

6 0
3 years ago
Someone please help me I’ll give out brainliest please dont answer if you don’t know
LiRa [457]

Answer:

turtles are vulnerable. so A is your correct answer

Step-by-step explanation:

6 0
3 years ago
Nathaly lost 29 cups of sugar by accidentally spilling it all over the floor after she cleaned it up,she asked her neighbor she
Taya2010 [7]

She needs 3 3/4 cups more

Step-by-step explanation:

(I think you accidently put the 18 3/4 part twice) but anyways if you add 3/4 and 1/2 you get 1 and 1/4 that will be important later then you do 18 + 6 = 24 and then add your 1 and 1/4 to get a total of 25 1/4 then you just minus that from 29 and get 3 and 3/4

Hope this Helps!

7 0
3 years ago
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