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Lapatulllka [165]
3 years ago
5

Sam is covering her rectangular pool for the winter. The area of the cover is x² + 13x + 42 ft². The length of the cover is (x +

7) feet.
A. What is the width of the cover? Make sure to include the unit of measurement.

B. How did you find the width? Explain in complete sentences.

C. If x = 4, what is the area of the pool cover?
please show your work
Mathematics
2 answers:
kirill115 [55]3 years ago
6 0

Answer:

A.....area= x^2+13x+42...factorizing= ( x+7)(x+6)

l=x+7

b=area/l=(x+6)(x+7)/(x+7)=(x+6) ft

B...its above...

C...area=lb

l= x+7=4+7=11

b=x+6=6+4=10

lb=11×10=110 ft

nadezda [96]3 years ago
5 0

Answer:

(x+6) feet, 110sq ft

Step-by-step explanation:

Area = width * length = something * (x + 7)

Width = (x+6) as 6 and 7 add to 13 and times to 42.

To confirm expand (x+6)(x+7)=x^2+6x+7x+42=x^2+13x+42

(x+6) feet

4^2+13(4)+42=16+52+42=110 sqft

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Answer:

3.9125 × 10⁵² people

Step-by-step explanation:

A rumor starts with 3 people and the number of people who heard it doubles each day.

How many people would have heard the rumor after 20 days?

To calculate exponential growth, we use the formula:

y (t) = ae^{kt}

where;

a = value at the start =3

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y(t) = 3 \times e^{6\times 20}

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2 years ago
Find the smallest non-zero whole number that is<br> divisible by 315, 378 and 392.
stepan [7]

Answer:

The smallest nonzero whole number that is divisible by 315,378 & 392 is the LCM of these 3 numbers. This can be found out by factorization method. Thus,the smallest nonzero whole number that is divisible by 315,378 & 392 is 52,920.

5 0
2 years ago
Please help me with this I need to find out what y is
julsineya [31]

Answer:

26°

Step-by-step explanation:

<DFG+<EFG = 180°( Being sum of adjacent angle in linear pair is 180°)

You can also write;

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By putting the value of those angles;

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2 years ago
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ludmilkaskok [199]
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as expected.
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