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3 years ago

10

Ava wants to buy new clothes for school. She wants to buy a pair of jeans that are on sale for $22 and spend the rest of her mon

ey on t-shirts. She has at most $60 to spend on clothes. If each t-shirt cost $8, what is the maximum number of t-shirts she can buy?

1 answer:

snow_tiger [21]3 years ago

5 0

She can buy 4 t-shirts

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B=3 V/h<br> I’m supposed to solve the question for V.

FromTheMoon [43]

Answer:
V=Bh/3

Explanation:
B=3V/h
1) Multiply h on both sides.
Bh=3v
2) Divide both sides by 3
Bh/3=V

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3 years ago

The midpoint of is M(–1, –2). One endpoint is C(–9, –4). Find the coordinates of the other endpoint D.

lions [1.4K]

x coordinate of D = distance of 9 - 1 = 8 from point M

y coordinate of D = 4-2 = 2 from point M

so coordinates of D are (--1+8 , -2 + 2) = (7 , 0) answer

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3 years ago

A rectangular area is to be enclosed by a wall on one side and fencing on the other three sides. If 18 meters of fencing are use

Rashid [163]

Answer:

$A = L W= 9*\frac{9}{2}=\frac{81}{2} m^2$

Step-by-step explanation:

For this case we assume that the total perimeter is 18 ft, we have a wall and the two sides perpendicular to the wall measure x units each one so then the side above measure P-2x= 18-2x.

And we are interested about the maximum area.

For this case since we have a recatangular area we know that the area is given by:

$A= LW$

Where L is the length and W the width, if we replace from the values on the figure we got:

$A(x)= x *(18-2x) = 18x -2x^2$

And as we can see we have a quadratic function for the area, in order to maximize this function we can use derivates.

If we find the first derivate respect to x we got:

$\frac{dA}{dx} = 18-4x=0$

We set this equal to 0 in order to find the critical points and for this case we got:

$18-4x=0$

And if we solve for x we got:

$x=\frac{18}{4}=\frac{9}{2} m$

We can calculate the second derivate for A(x) and we got:

$\frac{d^2 A}{dx^2}= -4$

And since the second derivate is negative then the value for x would represent a maximum.

Then since we have the value for x we can solve for the other side like this:

$L= 18-2x = 18-2 \frac{9}{2}= 18-9 =9m$

And then since we have the two values we can find the maximum area like this:

$A = L W= 9*\frac{9}{2}=\frac{81}{2} m^2$

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3 years ago

The perimeter of a triangle is 64cm ,the sides are the ratio 6:5:5 , work out the area of the triangle

Fofino [41]

The area is 192 cm^2

the sides are 20 20 24 with the base being 24

to figure out the height you have to use Pythagorean theorem of the triangle cut in half so 12^2 + b^2 = 20^2
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4 years ago

Find the equation of the exponential function represented by the table below

Gennadij [26K]

Answer:

y = 3^(1 + x)

Step-by-step explanation:

Notice that each time x increases by 1, y increases by a factor of 3.

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y = 3^(1 + x)

Check: If x = 0, do we get 3? 3^(1 + 0) = 3 (correct)

If x = 2, do we get 27? 3(1 + 2) = 3^3 + 27 (correct)

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3 years ago