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frez [133]
3 years ago
9

Anna is organizing 40 sheets of red and blue scrapbook paper. She places 15 blue sheets in each of 2 folders. Then she splits th

e red sheets equally between the 2 folders. Three of these equations can be used to solve for n, the number of red sheets in each folder. Which equation CANNOT?
Mathematics
2 answers:
Art [367]3 years ago
8 0
What equations are you using for this question?
Papessa [141]3 years ago
5 0

Answer:

2n+15=40

Step-by-step explanation:

You might be interested in
Select the measures of the angles of a triangle whose angles have measures in the ratio 6:8:10
morpeh [17]

Answer:

45, 60, 75

Step-by-step explanation:

The ratio of the angles are 6:8:10

Multiply by x to get the angle measures

6x, 8x,10x

We know the sum of the angles is 180 for a triangle

6x+8x+10x = 180

Combine like terms

24x = 180

Divide each side by 24

24x/24 = 180/24

x =7.5

Each angle is

6x = 6(7.5) =45

8x = 8(7.5) =60

10x = 10*7.5 = 75

4 0
3 years ago
The population of a town doubled every 5 years from 1960 to 1975. What is the percentage increase in population in this period ?
777dan777 [17]

Answer:

<h2>800%</h2>

Step-by-step explanation:

Let p represent the population

in 1965 → the population becomes 2p

in 1970 → the population becomes 2(2p) = 4p

in 1975 → the population becomes 2(4p) = 8p

 p  ——————> 100%

8p  ————-—-> x%

then

x=\frac{8p*100}{p}=800

5 0
3 years ago
John takes out a personal loan for $5,000 at an annual interest rate 7.5%, compounded monthly. He plans to pay off the loan (inc
myrzilka [38]

Answer:

155.53

Step-by-step explanation:

I know where this question is from hahaha

6 0
3 years ago
If 3/x = 5/y , what is the value of y/x?<br><br><br> (15 POINTS AND FREE BRAINIEST ANSWER!!)
Novay_Z [31]
3/x=5/y multiply both sides by y

3y/x=5  divide both sides by 3

y/x=5/3
8 0
3 years ago
Read 2 more answers
Which equation is true when r = 7 ?
jeka57 [31]

Answer:

7 = 49 ÷ r

Step-by-step explanation:

To find the equation that is true when r = 7, we need to find a number after the equals sign that is a multiple of 7.

Multiples of 7:  

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77...

Therefore, the only answer option in which the number after the equals sign is a multiple of 7 is:

7 = 49 ÷ r

To prove this, input r = 7 into each of the equations:

   6 = 30 ÷ r

⇒ 6 = 30 ÷ 7

⇒ 6 ≠ 4.285... ← incorrect!

   7 = 54 ÷ r

⇒ 7 = 54 ÷ 7

⇒ 7 ≠ 7.714... ← incorrect!

   7 = 49 ÷ r

⇒ 7 = 49 ÷ 7

⇒ 7 = 7 ← correct!

   9 = 72 ÷ r

⇒ 9 = 72 ÷ 7

⇒ 9 ≠ 10.285... ← incorrect!

8 0
2 years ago
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