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torisob [31]
3 years ago
13

Please help and thank you

Mathematics
1 answer:
inysia [295]3 years ago
6 0

Answer: The answer is C) 44 units.

Step-by-step explanation:

The question is asking for perimeter, not area. Instead of multiplying 9*13 to get area, we need to add the sides together. If the width on one side is 13, so is the witdh on the other side. This rule applies to the length as well.

9 + 9 + 13 + 13 = 44, so the perimieter of the rectangle is 44 units.

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balu736 [363]

Answer:

8

Step-by-step explanation:

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7 0
2 years ago
A piggy bank contains pennies, nickels, and dimes. The number of dimes is 15 more than the number of nickels, and there are 140
amm1812

Answer:

Option D is correct.

There are 34 nickels in the piggy bank.

Step-by-step explanation:

A piggy bank contains pennies, nickels and dimes.

Let the number of pennies be p

Let the number of nickels be n

Let the number of dimes be d

Also, note that 1 penny = $0.01

1 nickel = $0.05

1 dime = $0.10

- The number of dimes is 15 more than the number of nickels.

d = 15 + n

- There are 140 coins altogether totaling $7.17.

p + n + d = 140

0.01p + 0.05n + 0.1d = 7.17

Bringing the 3 equations together

d = 15 + n (eqn 1)

p + n + d = 140 (eqn 2)

0.01p + 0.05n + 0.1d = 7.17 (eqn 3)

Substitute (eqn 1) into (eqn 2)

p + n + d = 140

p + n + (15 + n) = 140

p + 2n + 15 = 140

p = 140 - 15 - 2n = 125 - 2n

p = 125 - 2n (eqn 4)

Substitute (eqn 1) and (eqn 4) into (eqn 3)

0.01p + 0.05n + 0.1d = 7.17

0.01(125 - 2n) + 0.05n + 0.1(15 + n) = 71.7

1.25 - 0.02n + 0.05n + 1.5 + 0.1n = 7.17

0.1n + 0.05n - 0.02n + 1.5 + 1.25 = 7.17

0.13n + 2.75 = 7.17

0.13n = 7.17 - 2.75 = 4.42

0.13n = 4.42

n = (4.42/0.13) = 34

d = 15 + n = 15 + 34 = 49

p = 125 -2n = 125 - (2×34) = 125 - 68 = 57

Hence, there are 57 pennies, 34 nickels and 49 dimes in the piggy bank.

Hope this Helps!!!

7 0
3 years ago
Mollie drinks a lot of water throughout the day! She drinks 3 and 1/2 liters of water every 2/3 of an hour. How many liters of w
Murrr4er [49]

Answer:a gallon

Step-by-step explanation:if you add cup by cup you can see that it is a gallon by adding them or putting it in a allon jug

6 0
2 years ago
2x + 4 - 3x + 2 + 3x
KatRina [158]

Answer:

factor the expression:2(x+3

simply the expression:2x+6

Step-by-step explanation:

tell me if you don't get it

7 0
3 years ago
Can someone please help me with this. (please show work)​
marysya [2.9K]
This for the first one

6 0
2 years ago
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