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3 years ago

24. If Jenna spent 30 hours on the computer this week. how much total time did she spend on

Mathematics

1 answer:

Verdich [7]3 years ago

7 0

Option B) 3 hours is the time spent by Jenna on the e-mail this week.

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

Jenna spent 30 hours on the computer this week.

The amount of time she spends on computer to work on various fields in given in the pie-chart.

This 30 hours represents her 100% work on computer.

From the figure shown,

She spent 10% of her total work on e-mail.

Therefore, 10% of 30 is the work done in hours by her on e-mail.

⇒ (10/100) × 30

⇒ 0.1 × 30

⇒ 3 hours

∴ Option B) 3 hours is the time spent by Jenna on the e-mail this week.

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Solve.

Artist 52 [7]

Answer:

(5,-3) if the system is

y=x-8

2x+3y=1

Step-by-step explanation:

I think the system is to read:

y=x-8

2x+3y=1.

Please correct me if I'm wrong.

I'm going to plug 1st equation into 2nd equation giving me:

2x+3(x-8)=1 ->I replaced y with (x-8).

Distribute:

2x+3x-24=1

Combine like terms:

5x-24=1

Add 24 on both sides:

5x=25

Divide both sides by 5:

x=5

If y=x-8 and x=5, then y=5-8=-3.

The solution is (5,-3).

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4 years ago

Suppose a city with population 100,000 has been growing at a rate of 8% per year. If this rate continues, find the population

Natalija [7]

Answer:

$370,002\ people$

Step-by-step explanation:

In this problem we have a exponential equation of the form

$y=a(b^x)$

where

y is the population of the city

x is the number of years

a is the initial value or y-intercept

b is the base

r is the rate of growth

b=(1+r)

we have

$a=100,000\ people\\r=8\%=8/100=0.08\\b=1+0.08=1.08$

substitute

$y=100,000(1.08^x)$

For x=17 years

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$y=100,000(1.08^17)$

$y=370,002\ people$

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4 years ago

The ratio of people to books in a classroom is 10:4 what is the unit rate of people per book

Alex73 [517]

Answer:

Unit rate of people per book = 2.5

Step by step explanation:

Given:

Number of peoples = $10$

Number of books = $4$

Their ratios = $10 : 4$

We have to find the unit rate of people per book.

To find out the unit rate of people per book we have to divide the total number of peoples by the total number of books.

For this we will follow the unitary method:

For $4$ book there are $10$ persons.

For $1$ book there will be $\frac{10}{4}$ persons.

So,

The numeric value = $\frac{10}{4}$

= $2.5$

There are 2.5 people per book and that it also the unit rate of people per book.

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3 years ago

Find the area of these shape

erastovalidia [21]

Draw a line on the hole which forms a square. The square lengths are 3 inches because 12-9 equals 3. 3^2= 9 which is the area of that square below the rectangle. Draw another line to separate the big rectangle into two rectangles. The smaller of these two new rectangles dimensions are 4 by 7 in. 7x4= 28 ft as the area of the smaller rectangle. The dimensions are the larger rectangle are 4 by 9 inch. The area of the larger rectangle is 36 inches.

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4 years ago

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Which expression is equivalent to 7 − 9 ?

Pachacha [2.7K]

Answer:

Try subtracting 9 from 7 to find the value.

Step-by-step explanation:

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3 years ago