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3 years ago

12. Solomon scored 88% on his math test. If the test had 25 questions total, how many

Mathematics

1 answer:

cestrela7 [59]3 years ago

4 0

Answer:

He missed 3 questions (which is a score of 22/25 that equals 88%)

Step-by-step explanation:

This is just what I've taught to judge this by "eye level" how to solve questions like these. In this case, since it's a 25 question test, if you divide 25/100 that means each question was 4 points.

So if 20/25 is 80% and 25/25 is 100%, so the answer is between that range.

Hope it helps.

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A town has a population of 17000 and grows at 3% every year. To the nearest year, how long will it be until the population will

Mumz [18]

Answer:

The population will reach 20,400 after 6 years.

Step-by-step explanation:

Exponential function:

$y(t)=y_0(1+r)^t$

y(t)= Population after t years

$y_0$ = initial population

r= rate of grow

t= time.

A town has a population of 17,000 and grows at a rate 3% every year.

y(t)= 20,400, $y_0$ = 17,000, r=3%=0.03, t=?

$20,400=17,000(1+0.03)^t$

$\Rightarrow \frac{20,400}{17,000}=(1.03)^t$

$\Rightarrow \frac{102}{85}=(1.03)^t$

Taking ln function both sides

$\Rightarrow ln|\frac{102}{85}|=ln|(1.03)^t|$

$\Rightarrow ln|\frac{102}{85}|=t\ ln|(1.03)|$

$\Rightarrow t=\frac{ln|\frac{102}{85}|}{\ ln|(1.03)|}$

⇒ t = 6 year.

The population will reach 20,400 after 6 years.

6 0

4 years ago

What is the equation of the line that passes through the points (2, 6) and (4, 10)?

ExtremeBDS [4]

Using the y=mx+b method and y1-y2/x1-x2
it would look like this

6-10=-4
divide
2-4=-2
and m=2 (slope)
then using y=mx+b
plug n chug

6=2(2)+b
6=4+b
b=2

thus, your equation is

y=2x+2

6 0

3 years ago

Read 2 more answers

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olasank [31]

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3 years ago

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