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Novosadov [1.4K]
3 years ago
7

Sharon is making rectangular posters. Each poster has an area of 4800 square inches and the length is 20 inches more than the wi

dth. Find the length and width of her poster.
Mathematics
1 answer:
makkiz [27]3 years ago
5 0

Area of a rectangle is LxW. We let x = width and x+20 = length. Using the formula we will evaluate;

A = LxW

4800 = (x+20)(x)

x² + 20x – 4800 = 0

We will get the factors of it to determine x values, in this case, we are only looking at the positive x value since are dealing with the area.

x² + 20x + 4800 = 0

(x+80)(x-60) = 0

(x + 80) = 0    |  (x-60) = 0

x = - 80          | x = 60

x = 60, this is the width

x +20 = 80, this is the length 


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13. BASKETBALL Find the price of a $35 basketball that is on sale for 50% off<br> the regular price.
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$15

Step-by-step explanation:

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How many kilometers are in 765 yards? 1 yard = 3 feet 1 mile = 5,280 feet 1 kilometer = 0.621 miles
luda_lava [24]

Answer:

There are 0.70km in 765 yards.

Step-by-step explanation:

This is a problem of conversion of units, that can be solved by multiple rule of three's.

The first step is converting 765 yards to feet. We have that each yard has 3 feet, so

1 yard- 3 feet

765 yards - x feet

x = 765*3

x = 2295

So, in 765 yards there are 2295 feet.

Now, we have to convert 2295 feet to miles. Each mile has 5280 feet, so:

1 miles - 5280 feet

x miles - 2295 feet

5280x = 2295

x = 0.435 miles

So, in 765 yards there are 2295 feet which is 0.435 miles

Now, the final step is converting from miles to kilometers. Each km has 0.621 miles, so:

1km - 0.621 miles

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0.621x = 0.435

x = 0.70km

So, there are 0.70km in 765 yards.

7 0
3 years ago
What are the solutions to the quadratic equation 4x2 = 64?
Karolina [17]
<h2>Greetings!</h2>

Answer:

x = −4 and x = 4

Step-by-step explanation:

4x² = 64

Lets get x² on its own. To do this we divide each sides by 4:

x² = 16

Now to get just x, we need to square root this answer:

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x = √16

x = 4

But this can be ±4 as it -4 and 4 squared both give 16.

So your answer is x = −4 and x = 4


<h2>Hope this helps!</h2>
7 0
3 years ago
Read 2 more answers
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