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4 years ago

What are the perimeter and area of a rectangle with a length of 20in and a width of 15 in

Mathematics

2 answers:

Usimov [2.4K]4 years ago

8 0

P=2L+2W
P=2*20+2*15= 40+30=70 in
A=W*L=20*15=300 in²

Mice21 [21]4 years ago

3 0

The equation for the area of a rectangle is: A = lw, where l=length and w=width.
The perimeter of a rectangle is the sum of all the sides of the rectangle. The equation for the perimeter is: P = 2(l+w), where l=length and w=width.

You know that length, l = 20in, and width, w = 15in. So put those values into the equations:
1) Area of the rectangle:
A = lw
A = (20 in)(15 in)
A = 300 $in^{2}$

2) Perimeter of the rectangle:
P = 2(l+w)
P = 2(20in + 15in)
P = 2(35in)
P = 70 in.

The area of the rectangle is 300 $in^{2}$ and the perimeter is 70 in.

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What is the domain of this exponential function?

Pavlova-9 [17]

Answer:

Domain = x E R

Step-by-step explanation:

Since an exponential function has no restriction on the "x" value, its domain can range from anywhere on the plane of "x."

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3 years ago

Which measurement is the width of this rectangle? Area = 112 cm²

nevsk [136]

C. 10 cm
To understand the given problem use the formular of area.

Hence, area is the length and width of the object in unit squared.

Mathematically expressing, a = l x w
Since a = l x w
a = lw unit squared

Given:
Area = 112 cm2

Square root of Area = Square root of 112 cm2
Area = 10.58 cm

Check:
Area = (10.58 cm)^2
Area = 111.9 / 112

6 0

3 years ago

What is the approximate volume of a cylinder with a height of 2 ft and a radius of 6 ft? Use 3.14 to approximate pi. Express you

Keith_Richards [23]

Your answer would be an almighty

0 jk

It would be 226.08ft^3

8 0

3 years ago

Jean has a loan of $2,000 the rate of simple interest in 8% a year he has paid $640 interest how many years has he had the loan

Andreas93 [3]

Simple interest means the interest at the end of each year will always be 8% of 2000 (assuming he doesnt pay some of it off), and will not be compounded with the existing interest.

To get a percentage, multiply by the percentage/100, in this case i.e. multiply by 0.08.
2000*0.08 = $160.
Therefore he has $160 of interest each year to pay.
Now we just need to work out how many lots of 160 go into 640, i.e. divide through.
640/160 = 4 - therefore he has had the loan for 4 years.

8 0

3 years ago

2x - 3y = 2, 4x + 7y = -9.

kodGreya [7K]

Step-by-step explanation:if you like it press thank you ❤❤❤

2x-3y=2 4x+7y= -9

2x=2+3y

2x=2+3y

2 2

x=2+3y 4(2+3y) + 7y= -9

 2 2

8+12y + 7y= -9

2

8+12y+14y = -9

8+12y+14y= -18

26y= -26

26y = -26

y= -1

4x+7(-1)= -9

4x+(-7)= -9

4x-7= -9

4x = -2 now lets check,4(-1) + 7(-1)= -9 or 2(-1)-3(-1)=2

4 4 2 2

x=-1 -4 +(-7) = -9 -1-(-3)=2

2 2 -1+3=2

-2-7= -9 2=2

-9= -9

so the answer is x= -1 and y= -1

6 0

3 years ago