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3 years ago

A dime has the same value as 10 pennies. Marley brought 290 pennies to the bank. How many dimes did Marley get?

Mathematics

2 answers:

Free_Kalibri [48]3 years ago

6 0

I found the awnser by doing 10x10x2 witch equals 200. Then i know that 10x9 equals 90 so, you would get 29 dimes.

Aleonysh [2.5K]3 years ago

5 0

29. To solve all that you had to do was divide 290 by ten. This is because a group of ten pennies is equal to one dime.

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Find the smallest positive integer k such that 3240/k is a square number

sashaice [31]

Answer:

Step-by-step explanation:

First, factorize the number 3,240:

$3,240=2\cdot 1,620=2\cdot 2\cdot 810=2\cdot 2\cdot 2\cdot 405=2\cdot 2\cdot 2\cdot 2\cdot 5\cdot 81=2^3\cdot 5\cdot 9^2$

So,

$3,240=2^2 \cdot 2\cdot 5\cdot 9^2=18^2\cdot 10$

Now consider the fraction

$\dfrac{3,240}{k}=\dfrac{18^2\cdot 10}{k}$

If k = 10, then

$\dfrac{3,240}{k}=\dfrac{18^2\cdot 10}{10}=18^2$

is a square number.

For all k < 10, the fraction tex]\dfrac{3,240}{k}[/tex] is not a square number (this follows from factorization).

Or you can simply check the values of the fraction for all k < 10:

k = 1, $\dfrac{3,240}{1}=3,240$ is not a square number;
k = 2, $\dfrac{3,240}{2}=1,620$ is not a square number;
k = 3, $\dfrac{3,240}{3}=1,080$ is not a square number;
k = 4, $\dfrac{3,240}{4}=810$ is not a square number;
k = 5, $\dfrac{3,240}{5}=648$ is not a square number;
k = 6, $\dfrac{3,240}{6}=540$ is not a square number;
k = 7, $\dfrac{3,240}{7}$ is not a square number;
k = 8, $\dfrac{3,240}{8}=405$ is not a square number;
k = 9, $\dfrac{3,240}{9}=360$ is not a square number.

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3 years ago

Andy drove 840 miles in 12 hours. How much miles can he drive per hour?

Sergio039 [100]

Answer:

Step-by-step explanation:

840 / 12 = 70

7 0

2 years ago

Read 2 more answers

Which equation can replace 3x + 5y = 59 in the original system and still produce the same solution?

mafiozo [28]

Answer:

13x = 39

x=3

y=10

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1 year ago

The area of a rectangle is greater than or equal to 154 square centimeters. The width of the rectangle is 12 centimeters and the

soldier1979 [14.2K]

Answer:

x ≤ 12.83

(Any number under or equal to 12.8333...)

Step-by-step explanation:

154 ≥ 12x

12.833.... ≥ x

x ≤ 12.83

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2 years ago

Help me please please

Mariana [72]

Answer:

scale factor P to Q: 4/5 scale factor Q to P: 5/4

Step-by-step explanation:

Divide original length over new length and you'll get the scale factor.

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2 years ago