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Alona [7]
3 years ago
9

In 10 minutes, a heart can beat 700 times. At this rate in how many minutes will a heart beat 140 times? At what rate can a hear

t beat?
Mathematics
1 answer:
Taya2010 [7]3 years ago
5 0
It will take 2 minutes because if you divide 700 by 10 you get 70 then 140 divided by 70 equals 2
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Maya and Mabel are inspecting an 80:1 scale floor plan of their new house. The dimensions of the living room on the scaled floor
AveGali [126]

Answer:

208 ⅓ ft²

Step-by-step explanation:

1⅞ = 15/8 inches ÷ 12

= 5/32 feet on map

Actual = 5/32 × 80

= 25/2 feet

2½ = 5/2 inches ÷ 12

= 5/24 feet on map

Actual = 5/24 × 80 = 50/3

Actual area:

25/2 × 50/3

= 625/3 ft²

= 208 ⅓ ft²

4 0
3 years ago
Simplify the expression.<br> 3^-9 * 3^6 * 3^6<br><br> 3^3<br> 9^3<br> 27^3<br> 3^-324
kow [346]
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3 years ago
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3 0
3 years ago
Read 2 more answers
Multiply.<br> (3b-5) (7b+1)<br> Simplify your answer.
mylen [45]
<h3>Answer:</h3>

It would be 21b² -32b -5

<h3>Step-by-step explanation:</h3>

By using the FOIL method, you can simplify the equation.

<em>The Foil Method is </em><u><em>ac + ad + bc +bd</em></u><em>, or </em><u><em>First, Outer, Inner, Last.</em></u>

First, you multiply the first term in each bracket.

3b * 7b = 21b²

Next, you multiply the outer term in each bracket.

3b * 1 = 3b

Then, you multiply the inner term in each bracket.

-5 * 7b = -35b

After that, you multiply the last term in each bracket.

-5 * 1 = -5

Lastly, you combine like terms.

21b² + 3b -35b -5 ---> 21b² -32b -5

<em>21b² -32b -5 would be your answer, since you cannot simplify the equation anymore.</em>

7 0
3 years ago
Rewrite log[(ac^3/b)]using the properties of logarithms
stellarik [79]

Answer:

1st option

Step-by-step explanation:

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note that the cube is only for c not a

6 0
3 years ago
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