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3 years ago

PLEASE HELP ME WITH THIS ASAP

Mathematics

1 answer:

iris [78.8K]3 years ago

5 0

Answer:

1900 ft

Step-by-step explanation:

To find the area where roses will be planted, find the area of the 2 triangles. 60×38 divided by 2 = 1140ft. 40×38 divided by 2 = 760. 760+1140=1900

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Explain how you can use absolute value to tell wether the sum of two integers is positive or negative

Rudiy27

Step-by-step explanation:

Using absolute value to tell wether the sum of two integers is positive or negative.

Suppose we have a positive integer,

x and a negative interger, -x and we want to find their sum, we take the absolute values of each of the integers, that is |x| and |-x|. Then we subtract these values: |x| - |-x|. If the larger integer is positive, the result of the difference is positive, but if the larger number is negative, the result of the difference is negative.

For any integer x, x + (-x) = 0

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3 years ago

Cost of Freon Automobiles built before 1993 use Freon in their air

frosja888 [35]

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Answer:

2000: 17.60 per pound
2010: 163.91 per pound
2025: 4,658.68 per pound

Step-by-step explanation:

We assume your formula is intended to be ...

p(t) = 17.6(1.25^t)

For t=0, ...

p(0) = 17.6

For t=10, ...

p(10) = 17.6·1.25^10 ≈ 163.91

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6 0

2 years ago

A (2,5 and B(-3,9) 1.The Midpoint of the straight

leva [86]

Answer:

Step-by-step explanation:

To figure out the midpoint, you need to plug the coordinates into the midpoint formula.

M (x1 + x2 / 2, y1 + y2/2)

M [ 2 + (-3)/2, 5 + 9/2]

M ( -1/2, 7)

5 0

3 years ago

Solve for x. −4(x−7)=36 Enter your answer in the box.

alex41 [277]

Answer:

The answer is x= -16!

Step-by-step explanation:

-4(x-7)=36

-4x- 28= 36

+28 +28

-4x= 64

/-4 /-4

x= -16

I hope this helps!

p.s. have any more questions? Post the question and comment the link below!

Ciao!

♥, Sadie

5 0

3 years ago

Read 2 more answers

A rectangular box is to have a square base and a volume of 20 ft3. If the material for the base costs $0.35 per square foot, the

denpristay [2]

Answer:

Length = 2 ft

Width = 2 ft

Height = 5 ft

Step-by-step explanation:

Let the square base of the box has one side = x ft

Therefore, area of the base = x² ft²

Cost of the material to prepare the base = $0.35 per square feet

Cost to prepare the base = $0.35x²

Let the height of the box = y ft

Then the volume of the box = x²y ft³ = 20

$y=\frac{20}{x^{3} }$ -----(1)

Cost of the material for the sides = $0.10 per square feet

Area of the sides = 4xy

Cost to prepare the sides of the box = $0.10 × 4xy

= $0.40xy

Cost of the material to prepare the top = $0.15 per square feet

Cost to prepare the top = $0.15x²

Total cost of the box = 0.35x² + 0.40xy + 0.15x²

From equation (1),

Total cost $C=0.35x^{2}+(0.40x)\times \frac{20}{x^{2} }+0.15x^{2}$

$C=0.35x^{2}+\frac{8}{x}+0.15x^{2}$

$C=0.5x^{2}+\frac{8}{x}$

Now we take the derivative of C with respect to x and equate it to zero,

$C'=0.5(2x)-\frac{8}{x^{2}}$ = 0

$x-\frac{8}{x^{2}}=0$

$x=\frac{8}{x^{2} }$

$x^{3}=8$

x = 2 ft.

From equation (1),

$(2)^{2}y=20$

4y = 20

y = 5 ft

Therefore, Length and width of the box should be 2 ft and height of the box should be 5 ft for the minimum cost to construct the rectangular box.

8 0

3 years ago