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scZoUnD [109]
3 years ago
10

Can someone help with this?

Mathematics
1 answer:
Ivanshal [37]3 years ago
5 0

Answer:

72 beats per minute

Step-by-step explanation:

So if a female has a pulse rate of 80 beats per minute but her pulse rate is lowe by 10%

First, we need to find what 10% of 80 is

.10 Times 80 = 8

Now we subtract 8 from 80

80-8=72

The female has a heartbeat of 72 beats per minute (bpm)

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Round each fraction to 0, 1/2, or 1. Use a number line if needed. what would 9/16 be?
harkovskaia [24]
The answer would be 1/2 because the closest to 9/16 is 8/16 which can be simplified to 1/2
3 0
3 years ago
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What is the slant height for given pyramid to the nearest to the whole unit?
koban [17]

Answer:

  B  5 cm

Step-by-step explanation:

The bottom leg of the shaded triangle is 1/2 of the length of the side, so is 3 cm. The vertical leg of the shaded triangle is the height of the pyramid, given as 4 cm.

The slant height is the hypotenuse of the shaded triangle, so can be found from your knowledge of the 3-4-5 triangle, or from the Pythagorean theorem.

If s is the slant height, then ...

  s^2 = 3^2 + 4^2 = 9 +16 = 25

  s = √25 = 5

The slant height is 5 cm.

6 0
3 years ago
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Element X is a radioactive isotope such that every 51 years, its mass decreases by half. Given that the initial mass of a sample
pychu [463]

Answer: It will take 6 years for 7500 grams of X to reach 6900 grams.

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for completion of half life:  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

51=\frac{0.69}{k}

k=\frac{0.69}{51}=0.0135years^{-1}

b) for  7500 g to reach to 6900 g

t=\frac{2.303}{0.0135}\log\frac{7500}{6900}

t=6years

It will take 6 years for 7500 grams of X to reach 6900 grams.

5 0
3 years ago
Which property of real numbers is shown below?<br><br> 3 + ((-5) + 6) = (3 + (-5)) + 6
oksano4ka [1.4K]
<span>3 + ((-5) + 6) = (3 + (-5)) + 6

It's </span>associative property of addition

The associative property of addition states that you can add regardless of how the numbers are grouped, result will state the same.
4 0
3 years ago
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Solve y=-2x+6 and 3y-x+3=0 using substitution
Mazyrski [523]
3(-2x+6) -x+3=0
-6x+18-x+3=0
-7x+21=0
-7x=-21
x=3

y=-2x+6
y=-2(3)+6
=6-6
=0

answer: (3,0)
7 0
3 years ago
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