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Lubov Fominskaja [6]

3 years ago

12

Help I keep failing! Thx in advance! Will give brainliest

1 answer:

N76 [4]3 years ago

6 0

Answer:

C. Antoine can buy 10 pounds or less of oranges. x=10

Step-by-step explanation:

If you take the amount of money he has and subtract $5.20 from it (bc of the pumpkin) you get $13. Then you divide $13 by $1.30. (the amount each pound of oranges cost) He can get either 10 pound or less of oranges with the money he has.

I hope this helped. I'm new to Brainly so I'm trying to help any way I can. Hope this helped you!

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Find all points on the curve y = cos x, 0 ≤ x ≤ 2π, where the tangent line is parallel to the line y = -x.

andre [41]

Answer:

90⁰

Step-by-step explanation:

y=cosx

y'= -sinx

eqñ of tangent is y=-x

slope of tangent =-1

we know...

slope of tangent = y' or derivative of y

-sin x = -1

sin x= 1

x = 90⁰

7 0

3 years ago

Luiza delivers newspapers in her neighborhood. If you plot the points (−1, 1), (4, 1), (4, −2) and (−1, −2), you will create a r

wel

The first thing to do in this case is to draw the ordered pairs in the Cartesian plane and join the points.
We have then that the resulting figure is a rectangle.
We must find the perimeter of the rectangle that is given by:
P = 2L + 2W
Where,
L: long
W: width
Restoring the values:
P = 2 * (5) + 2 * (3)
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Answer:
her route cover 16 miles.

5 0

4 years ago

Read 2 more answers

An open box with a square base is constructed so that it has a volume of 64in^3. The base needs to be made out of a material tha

Ivahew [28]

The volume of a box is the amount of space in the box

The dimensions that minimize the cost of the box is 4 in by 4 in by 4 in

<h3>How to determine the dimensions that minimize the cost</h3>

The dimensions of the box are:

Width = x

Depth = y

So, the volume (V) is:

$V = x^2y$

The volume is given as 64 cubic inches.

So, we have:

$x^2y = 64$

Make y the subject

$y = \frac{64}{x^2}$

The surface area of the box is calculated as:

$A =x^2 + 4xy$

The cost is:

$C = 2x^2 + 4xy$ --- the base is twice as expensive as the sides

Substitute $y = \frac{64}{x^2}$

$C = 2x^2 + 4x * \frac{64}{x^2}$

$C =2x^2 + \frac{256}{x}$

Differentiate

$C' =4x - \frac{256}{x^2}$

Set to 0

$4x - \frac{256}{x^2} = 0$

Multiply through by x^2

$4x^3 - 256= 0$

Divide through by 4

$x^3 - 64= 0$

Add 64 to both sides

$x^3 = 64$

Take the cube roots of both sides

$x = 4$

Recall that:

$y = \frac{64}{x^2}$

So, we have:

$y = \frac{64}{4^2}$

$y = 4$

Hence, the dimensions that minimize the cost of the box is 4 in by 4 in by 4 in

Read more about volume at:

brainly.com/question/1972490

4 0

2 years ago

What is the value of y? <br><br> A. 120° <br> B. 66° <br> C. Cannot be determined <br> D. 60°

lesya692 [45]

The answer is D because all sides are equal and it’s a equilateral triangle

6 0

3 years ago

there are n arithmetic means between 4 and 24. if the ratio of third mean to the last mean is 4:5 then find the number of terms

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6 0

3 years ago