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3 years ago

The width of a rectangular room is 80%

Mathematics

2 answers:

marin [14]3 years ago

6 0

Answer:

Formula of rectangle :-

l ×b

80/100 × 15 ×b

 8/10 × 15 ×b

80/100 × 15 =b

8/10 ×15 =b

4/5 × 15 =b

4 × 3 = b

b = 12feet

b = 12 feet

katrin [286]3 years ago

5 0

Answer:

12 feet

Step-by-step explanation:

Given: length = 15 feet, width = L x 80%

Unknown: width = ?

width = L x 80%

w = (15ft) x 80% or (15ft) x .80

w = 12 ft

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zmey [24]

Answer:

Part 1) The inequality that represent this situation is $5(x+7)^{2} \geq1,050$ or $5x^{2}+70x+245 \geq1,050$

Part 2) Yes, 8 inches is a reasonable width for his tablet

Step-by-step explanation:

Part 1)

Let

L -----> the length of the screen television

W ----> the width of the screen television

x ----> the width of Andrew's tablet

we know that

$L=5W$ ------> equation A

$W=x+7$ ----> equation B

The area of the television is

$A=LW$ -----> equation C

Substitute equation A and equation B in equation C

$A=5(x+7)(x+7)$

$A=5(x+7)^{2}$

$5(x+7)^{2} \geq1,050$

$5(x^{2}+14x+49) \geq1,050$

$5x^{2}+70x+245 \geq1,050$ ------> inequality that represent this situation

Part 2) Determine if 8 inches is a reasonable width for his tablet

For x=8 in

Substitute in the inequality

$5(8+7)^{2} \geq1,050$

$5(15)^{2} \geq1,050$

$1,125 \geq1,050$ -----> is true

therefore

Yes, 8 inches is a reasonable width for his tablet

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3 years ago

Mr. Rives' rotating sprinkler waters his lawn up to a radius of 7 feet. What is the maximum number of square feet of lawn mr. Ri

zaharov [31]

Answer:

Step-by-step explanation:

Mr. Rives' rotating sprinkler waters his lawn up to a radius of 7 feet. The formula for determining the area of a circle is expressed as

Area = πr²

Where

π is a constant whose value is 3.14.

r represents the radius if the circle.

The area covered by one of Mr. Rives' rotating sprinkler would be

3.14 × 7² = 3.14 × 49 = 153.86ft²

Therefore, the maximum area of lawn that two sprinklers can cover would be

153.86 × 2 = 307.72 ft²

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GREYUIT [131]

Answer:

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-x^2-2x+4 the first row

-(x^2+2x+1) for the second row or (-x^2-2x-1) is the same

put it together

-2x^2-4x+3

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3 years ago

What is the range of function of y-1=(x+3)^2

andreyandreev [35.5K]

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egoroff_w [7]

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