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Rudik [331]
2 years ago
13

Mr. Calloway has a rectangular yard that is 120 feet wide and 80 feet deep. To keep his dogs on his property, he needs to build

a fence. How much fencing does he need?
A. 200 ft

B. 36 ft

C. 400 ft

D. 480 ft

Mathematics
2 answers:
g100num [7]2 years ago
5 0

Answer: what I think the answer is 480 letter D

Step-by-step explanation:

gladu [14]2 years ago
3 0
C because 120+120=240 then 80+80=160 160+240=400
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why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime​
andrezito [222]

Step-by-step explanation:

because 7 is the highest prime number that when squared is less than 100, 11 yhe next prime number when squared is 121. As such all non-prime numbers less than 100 will be a would have prime factors of either 2, 3, 5 & 7

5 0
4 years ago
Find a positive number for which the sum of it and its reciprocal is the smallest​ (least) possible. Let x be the number and let
Allisa [31]

Answer:

S(x) = x + \frac{1}{x} --- Objective function

Interval = \{x:x=1\}

Step-by-step explanation:

Given

Represent the number with x

The required sum can be represented as:

x + \frac{1}{x}

Hence, the objective function is:

S(x) = x + \frac{1}{x}

To get the the interval, we start by differentiating w.r.t x

<em>Using first principle, this gives:</em>

S'(x) = 1 - \frac{1}{x^2}

Equate S'(x) to 0 in order to solve for x

0 = 1 - \frac{1}{x^2}

Subtract 1 from both sides

0 -1 = 1 -1 - \frac{1}{x^2}

-1 = - \frac{1}{x^2}

Multiply both sides by -1

1 = \frac{1}{x^2}

Cross Multiply

x^2 * 1 = 1

x^2  = 1

Take positive square root of both sides because x is positive

\sqrt{x^2} = \sqrt{1

x = 1

Representing x using interval notation, we have

Interval = \{x:x=1\}

To get the smallest sum, we substitute 1 for x in S(x) = x + \frac{1}{x}

S(1) = 1 + \frac{1}{1}

S(1) = 1 + 1

S(1) = 2

<em>Hence, the smallest sum is 2</em>

3 0
4 years ago
HELP ASAP
iris [78.8K]

Answer:

177

Step-by-step explanation:

just answered this for someone else but the number of sit-ups is going up in 4s so just add four to 33 7 times since thats how many days she has left til 12th day

8 0
3 years ago
Will mark brainliest <br> 20 pionts<br> Show work
Rufina [12.5K]

Answer:

Part A) The percentage increase was 6.1\%

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Step-by-step explanation:

Part A)

we know that

Using proportion

Let

x-----> the percentage increase

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Part B) Compare the percentage increase with the inflation

6.1\%>5\%

The percentage increase is greater than the inflation

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4 years ago
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