The area of Alicia's garden is 81 square feet. what are the dimensions of her garden?

Answers

Answer 1

Answer: If the garden is exactly square, then each side would be 20.25 . 81 divided by 4 (thats perimiter) and if you were talking about area than 9*9

Answer 2

Answer: 9 by 9
9 feet by 9 feet. There is more options but tht is the only whole number option

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A contractor charges $1,200 for 100 square feet of roofing installed. At this rate, how much does it cost to have 1,100 square feet installed?

Answers

Answer: $13200

Step-by-step explanation:

If 100 square feet of roofing is installed for a cost of $1,200

1,100 square feet would cost $Z (let the unknown cost be Z)

i.e 100 ft^2 = $1,200

1100 ft^2 = $Z

Hence, to get the value of Z, cross multiply

Z x 100 = 1200 x 1100

100Z = 130000

Divide both sides by Z

100Z/100 = 1320000/100

Z = $13200

Thus, $13200 is the cost to have 1,100 square feet of roofing sheet installed

Write 3 numbers that are greater than 543,000 but less than 544,000

Answers

Here are some, 543,555, 543,123, and 543,369

Hope this helps

A rational number can be written as a fraction with any number in the numerator and the denominator. Is this true or false? Why or Why not?

Answers

It's close to being true, but it needs a couple of clarifications.

The fraction needs whole numbers in the numerator and
denominator, and the denominator can't be zero.

Whats the percent of change?

10 gallons to 24 gallons

Answers

the 100% is 10 gallons, so 24 is x%:
10/100 = 24/x
x = 24*100/10
x = 240
so 24 gallons is 240%, the percent change is: 240 - 100 = 140%

Change = 24-10
Percentage change = 14/10 * 100 = 140%

-3/5 divided by -3/4

Answers

4/5. To divide fractions, you multiply by the reciprocal (flip the second fraction). This gives us (-3/5) x (4/-3). Since there is a -3 on the top and the bottom, they cancel out. That leaves 4/5.

My assignment says The perimeter of a rectangle is 30 cm.Find the whole-number dimensions of the rectangle with:
a) the greatest area
b) the least area
can someone explain?

Answers

Let side be "a" cm. So another side is (30-2a)/2=15-a
S=ab=a(15-a)=15a-a^2 - parabola
maximum when a = -15/-2=7.5 cm
When a=7.5 all sides are 7.5 cm
So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max
There is no global minimun for S.(look at the graphic)

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