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Pavel [41]
3 years ago
15

Carli can walk 40 dogs in 8 hours. How many dogs can she walk in 12 hours?

Mathematics
1 answer:
Archy [21]3 years ago
7 0

Answer:

60 dogs

Step-by-step explanation:

40/8 = 5 dogs per hour

12 x 5 = 60 dogs in 12 hours

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The answer is A (54pi square cm)
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If a person invests $500 at 2% simple interest for 4 years how much interest is earned
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$40
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Find the value of :x^2+2xy+y^2-3x-3y-1<br> have: x^2-y=y^2-x (x<img src="https://tex.z-dn.net/?f=%5Cneq" id="TexFormula1" title=
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7 0
2 years ago
A jar is filled with only dimes and quarters. The jar contains a total of 60 coins and the value of the jar is $11.25. How many
inessss [21]

Answer:

35 quarters

Step-by-step explanation:

This situation has two unknowns - the total number of dimes and the total number of quarters. Because we have two unknowns, we will write a system of equations with two equations using the two unknowns.

  • d+q=60 is an equation representing the total number of coins
  • 0.10d+0.25q=11.25 is an equation representing the total value in money based on the number of coin. 0.10 and 0.25 come from the value of a dime and quarter individually.

We write the first equation in terms of q by subtracting it across the equal sign to get d=60-q. We now substitute this for d in the second equation.

0.10(60-q)+0.25q=11.25\\6-0.10q+0.25q=11.25\\6+0.15q=11.25

After simplifying, we subtract 6 across and divide by the coefficient of q.

6+0.15q=11.25\\0.15q=5.25\\q=35

We now know of the 60 coins that 35 are quarters. To find the total value of the quarters, we multiply 35 by 0.25 and find 8.75.

3 0
3 years ago
Find the slope<br> (-5,2) (-12,-11)
KonstantinChe [14]

Answer:

m= 13/7

Step-by-step explanation:

(-5, 2) , (-12, -11)

Slope(m)

m= (y2-y1)/(x2-x1)

m= (-11 - 2)/(-12 + 5)

m= (-13)/(-7)

m= 13/7

5 0
3 years ago
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