Ask question

Ask question

All categories

3 years ago

8

david counts the quarters in his change jar. He has 24 more quarters than his brother Rob. if r is the number of quarters Rob ha

s, which expression represent the number of quarters and david and Rob have it all

1 answer:

denis-greek [22]3 years ago

8 0

Rob has R quarters, and David has R + 24 or 24 more than rob, so together they have 2R+24

You might be interested in

Two sides of a triangle have lengths 6 and 17. Which expression describes the length of the third side?

VashaNatasha [74]

The answer is D which is greater than 11 and less than 23.
<span>Sum of 2 sides of triangle is always greater than the third side. And absolute difference of 2 sides of a triangle is always less than the 3rd side. From that, 3rd side ia less than 6+17 = 23 and greater than 17-6=11.</span>

7 0

3 years ago

Read 2 more answers

Have you ever experienced what you thought to be an attempt at phishing, or have you ever received a phone call that sounded lik

8090 [49]

I have actually, but all I did was block the number, as I was not aware that they had any of my details.

7 0

3 years ago

A plane averaged 800 mph on a trip going east, but only 400 mph on the return trip. The total flying time in both directions wa

galina1969 [7]

Answer:

1200 miles.

Step-by-step explanation:

Let d represent one way distance.

We have been given that a plane averaged 800 mph on a trip going east, but only 400 mph on the return trip.

$\text{Time}=\frac{\text{Distance}}{\text{Speed}}$

The time taken while going east would be $\frac{d}{800}$ .

The time taken while returning back would be $\frac{d}{400}$ .

Since the total flying time in both directions was 4.5 hr, so we will equate sum of both times with 4.5 as:

$\frac{d}{800}+\frac{d}{400}=4.5$

Make a common denominator:

$\frac{d}{800}+\frac{d*2}{400*2}=4.5$

$\frac{d}{800}+\frac{2d}{800}=4.5$

$\frac{d+2d}{800}=4.5$

$\frac{3d}{800}=4.5$

$\frac{3d}{800}\times \frac{800}{3}=4.5\times \frac{800}{3}$

$d=1.5\times \frac{800}{1}$

$d=1200$

Therefore, the one-way distance was 1200 miles.

5 0

3 years ago

You have a coupon for 10% off a dvd that cost 15$ if a tax of 8% is charged on the original amount what will you pay for the dvd

Tatiana [17]

Answer:

Should Be 14.58

Step-by-step explanation:

8 0

3 years ago

A bookstore has 36 copies of the latest bestseller and they fit exactly on 3 shelves. The bookstore ordered another 120 copies.

lesya [120]

Answer:

13

Step-by-step explanation:

First, to find out how many book fit on one shelf, you will need to divide the total number of books by the toal number of shelves:

36 books / 3 shelves = 12 books/shelf

Because the question says that the bookstore order <em>another</em> 120 copies, this is means that the 120 books is in addition to the original 36 books.

Because we already know that the 36 books require 3 shelves, we still need to find how many shelves 120 books needs. So, we can divide books by number of how many books <em>can</em> fit on a shelf:

120 books / 12 books per shelf = 10 shelves

So to find the total number of shelves needed, add the number of shelves together:

3 + 10 = 13 shelves

5 0

2 years ago