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3 years ago

While exercising Julie found that her. Heart was beating 12times every 5 seconds how many times was it beating per min

Mathematics

2 answers:

Vika [28.1K]3 years ago

7 0

12 times / 5 seconds * (60 seconds / 1 min) = 144 times / min

Katyanochek1 [597]3 years ago

6 0

Answer: 144.

Step-by-step explanation:

Given : While exercising Julie found that her. Heart was beating 12 times every 5 seconds .

Number of times heart beats in 1 second = $\dfrac{12}{5}$

Since, 1 minute = 60 seconds

Then, Number of times heart beats in 60 second = $\dfrac{12}{5}\times60=144$

Hence, the number of times heart beats in 1 minute = 144.

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What is the length of the missing leg? If necessary, round to the nearest tenth.

zhannawk [14.2K]

Answer:

5cm

Step-by-step explanation:

To find the missing side we use the hypotenuse theorem.

a^2 + b^2 = c^2

The longest side of the triangle would be c. So substitute the numbers into the variables.

a^2 + 12^2 = 13^2

a^2 = 13^2 - 12^2

a^2 = 169 - 144

a^2= 25

a = √25

a=5

The missing leg's length is 5cm

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2 years ago

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What is parallel to y=3x+1 you can only use the numbers 3,-2,1,4,-1,0,2,5 and put it in y= x +

DiKsa [7]

Answer:

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Step-by-step explanation:

A parallel line has the same slope as the other line.

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y = 3x + b

plug in points (1, 4) to determine b

4 = 3(1) + b

4 = 3 + b

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4 - 3 = b

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3 years ago

Find the value of 5 ∙ 23. 30 40 1,000 ASAP

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If you buy six pens and one mechanical pencil, you'll get only $1 change from your $10 bill. but if you buy four pens and two me

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Let p be the prize of a pen and m the prize of a mechanical pencils. If you buy six pens and one mechanical pencil, you spend 6p+m. We know that this equals 9, because you get 1$ change from a 10$ bill.

Similarly, if you buy four pens and two mechanical pencils, you spend 4p+2m, which is 8$, because now you get a $2 change. Put these equation together in a system:

$\begin{cases} 6p+m=9\\4p+2m=8\end{cases}$

Now, if you multiply the first equation by 2, the system becomes

$\begin{cases} 12p+2m=18\\4p+2m=8\end{cases}$

Subtract the second equation from the first:

$12p+2m - (4p+2m) = 18-8 \iff 8p = 10 \iff p = \dfrac{10}{8} = 1.25$

Plug this value into the first equation to get

$6p+m=9 \iff 6\cdot 1.25 +m = 9 \iff 7.5 +m=9 \iff m = 9-7.5 = 1.5$

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