MATHEMATICS HIGH SCHOOL

The width of a rectangle is five less than twice the length. What is the minimum area of the rectangle?

Answers

Answer 1
Answer: W=2L-5

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A=L*W

=L(2L-5)

=2L²-5L

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dA/dL=4L-5

When dA/dL=0,

4L-5=0

4L=5

L=5/4

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When L=5/4

A=5/4*(2*(5/4)-5)

=5/4*(10/4-20/4)

=5/4*((-10)/4)

=5/4*(-5/2)

=-25/8

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*You may have been given a badly written out question. The answer doesn't make sense.

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Answer:

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-3m - [2m + (5 - m)] + 7 was simplified as 2 - 4m. Without simplifying, explain how you can show that it has been simplified correctly.

Answers

Answer:

the answer and explanation is in the picture

Step-by-step explanation:

hope this helps

please like and Mark as brainliest

Express the product of 4-3i and 2+i in simplest a+bi form

Answers

(4-3i)(2+i)=8+4i-6i-3i^2=8-2i+3=11-2i
recall that i*i= -1

Answer:

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Sixteen is fourteen less than the product of a number and five. What is the number?

Answers

16=5x-14
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Over two summers, Ray saved $900 and $500. The polynomial 900x2 + 500x represents his savings at the beginning of the third year, where x is the growth factor. (The interest rate r is x - 1.) What is the interest rate he needs to start the third year with $1600 in savings? A. 0.1% B. 1.1% C. 8.4% D. 264%

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Craig is delivering boxes of paper to each floor of an office building. Each box weighs 64 pounds, and Craig weighs 160 pounds. If the capacity of the elevator is 2000 pounds, what is the maximum number of boxes he can deliver on each elevator trip?

Answers


If the maximum load on the elevator is  2,000 pounds,
and Craig weighs  160 pounds, that leaves

                       (2,000 - 160)  =  1,840 pounds for paper.

If each box weighs  160 pounds, then how many boxes
can he carry without going over the  1,840-pound limit ?

           (1,840  /  64)  =  28.75 .

28 boxes weigh  1,792 pounds, and 29 boxes weigh  1,856 pounds.

28 boxes will leave him with  48 more pounds of capacity,
but 29 boxes would weigh too much. 

He should take  28 boxes with him on each trip, and then,
on the last trip, he can use the extra  48 pounds allowed
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Solve:-

2000 - 160 = 1840

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So, Craig can deliver about 28 boxes on each elevator trip.
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