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Annette [7]
3 years ago
5

Usr mental math to find the sum of $12.15, $16.85, and $1.74. A. $29.00 B.$30.74 C.$30.85 D.$32.74.

Mathematics
2 answers:
Yanka [14]3 years ago
7 0

12.15+16.85+1.74=30.74

natima [27]3 years ago
7 0

=12.15 + 16.85 + 1.74 = 30.74

B. $30.74

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120 books increased by 55%
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55% of 120 is just 66
add that with 120, 186

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Zohar is using scissors to cut a rectangle with a length of 5x - 2 and a width of 3x + 1 out of a larger piece of paper. Which
kirza4 [7]

Answer:

2*(5x - 2) + 2*(3x+1) ; Perimeter = 62 centimeters

Step-by-step explanation:

2*(5x - 2) + 2*(3x+1) = 10x - 4 + 6x + 2

                                = 16x -2

If x = 4 , then Perimeter = 16*4 - 2 = 64 - 2 = 62 cm

4 0
3 years ago
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The semi-circle has a diameter of 8. What is the perimeter of the semi-circle?​
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roughly 12.56 units

Step-by-step explanation:

Since the perimeter of a circle is 2*pi*r, we can divide it by two or multiply by half in order to find the perimeter of a semicircle

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Plug in what we know...

C=2*pi*4

Solve

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divide by 2

25.12/2=12.56

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6 0
3 years ago
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You estimate that a jar contains 68 marbles. The actual number of marbles is 60. Find the percent error. Round your answer to th
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Step-by-step explanation:

Hello!! I for got how to solve this but, I think it is:

68 x 0.60 = 40.8

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5 0
3 years ago
Felix has $1,000 in his savings account. He wants to purchase a motorcycle for $5,000. The seller has agreed to take a payment o
grigory [225]

Answer:

The system of equations is

(1) Amount balance to buy the motorcycle = Cost of motorcycle - Balance in savings

(2) Number of months Felix would need to make up the amount balance to buy the motorcycle = When Felix will have enough money to completely pay for his motorcycle

(3) Number of months Felix would need to make up the amount balance to buy the motorcycle = When Felix will have enough money to completely pay for his motorcycle

(4) The period it will take for Felix to have enough money to completely pay for his motorcycle is 8 months

Step-by-step explanation:

Here we have

Balance in savings = $1,000

Amount available to Felix each month = $500

Amount balance to buy the motorcycle = Cost of motorcycle - Balance in savings

= $5,000 - $1,000 = $4,000

Number of months Felix would need to make up the amount balance to buy the motorcycle = When Felix will have enough money to completely pay for his motorcycle

The above is given by

Number of months = Amount balance to buy the motorcycle ÷ Amount available to Felix each month

∴ Number of months = $4,000 ÷ $500 = 8 Months

That is Felix will have enough money to pay for his motorcycle in 8 months.

8 0
3 years ago
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