2 years ago

I need help for grades!!!

Mathematics

1 answer:

irina1246 [14]2 years ago

5 0

Yes, the relation shown is a function because every element in the domain has only one distinct image in the co-domain.

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The sum of two numbers is 44. One number is 3 times as large as the other. What are the numbers?

jok3333 [9.3K]

Your numbers are 11 and 32

We know that:
a + b = 44
and
a = 3b

If we substitute “3b” in for a in the first equation, we get a numerical value for b

3b + b = 44
4b = 44
b = 11

Then we substitute the numerical value of b to solve for a:
a = 3b
a = 3(11) = 33

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2 years ago

A teenager’s heart pumps an average of 7200 L of blood every 24 hours. What is the rate of change of volume of blood?

love history [14]

Answer:

300L per hour

Step-by-step explanation:

The rate of change of volume of blood pumped by the teenager's heart expresses the volume of blood pumped with respect to hour.

Rate of change of volume of blood = $\frac{volume of blood}{time}$

= $\frac{7200L}{24}$

= 300L/hour

The rate of change of volume of blood by the teenager's heart is 300 litres per hour. This implies that his/ her heart pumps 300 litres of blood every hour.

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2 years ago

In Jamie's class, 7 out of 25 students have blue eyes. what percent of the class has blue eyes?

katovenus [111]

The answer is 28 %, this is the percent of the class with blue eyes.

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2 years ago

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There are 62rows of 9 chairs in the movie theater about how many chairs are there

dem82 [27]

It's easy it's just 62×9 it equals 558

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