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svetoff [14.1K]
1 year ago
13

A banner is in the shape of a rectangle.It is 18 feet long and 9 feet wide.What is its perimeter?

Mathematics
1 answer:
Hatshy [7]1 year ago
6 0

The given problem can be exemplified in the following diagram:

The perimeter of a figure is the sum of all of its sides, therefore, the perimeter of the figure is:

P=18ft+18ft+9ft+9ft

Adding the terms:

P=54ft

therefore, the perimeter is 54 feet.

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the sum of the reciprocals of two consecutive even integers is 9/40. this can be represented by the equation shown 1/x + 1/(x+2)
Ivanshal [37]

Answer:

  8, 10

Step-by-step explanation:

Multiplying the equation by the product of the denominators, we have ...

  40(x+2) +40x = 9x(x+2)

  80x +80 = 9x^2 +18x . . . . eliminate parentheses

  9x^2 -62x -80 = 0 . . . . . . put in standard form

  9x^2 -72x +10x -80 = 0 . . . prepare to factor by grouping

  9x(x -8) +10(x -8) = 0 . . . . . factor pairs of terms

  (9x +10)(x -8) = 0

Solutions are ...

  x = -10/9  and  x = 8

The integers are 8 and 10.

_____

<em>Comment on the attachment</em>

I find a graphing calculator to be a nice tool for solving these. It finds zeros easily, so writing the equation so it equals zero is a useful first step.

5 0
3 years ago
Larissa asked 40 students to name their favorite food. 10 students said their favorite food was pizza. What percent of the stude
AfilCa [17]
25% percent 
10/40 is also 1/4 simplified.
1/4 as a fraction is 25%, 25 times 4 equals 100.

<u>OR</u>

Use 1/4, but divide 1 by 4(fraction is also division)
You get 0.25
Turn  this into a percent by moving the decimal point to the right 2 times. 
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3 0
3 years ago
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For each month of a year, Selena saved
Schach [20]

Answer:

[1800-100(12)]/12 = (1800-1200)/12 = 600/12 = 50

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
How do you find the answer of -22-x=5+6x+9???
postnew [5]
-22-x=5+6x+9
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5 0
3 years ago
I need help i don’t know which one is right please help
olga55 [171]

Answer: 12√2

Step-by-step explanation:

This is a 45-45-90 triangle. In this triangle, a and b are equal lengths, therefore hypotenuse, c, is x√2.

Since a and b is 12, c is 12√2.

7 0
3 years ago
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