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2 years ago

Is there a proportional relationship between time and the cost of the cell phone plan? Explain how you know.

Mathematics

1 answer:

lora16 [44]2 years ago

5 0

Answer:

yes, phone companies, are only allowed to charge for the amount of data you use

Step-by-step explanation:

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Gor is running a bakery. He has made a street sign to direct people to his

lys-0071 [83]

Answer:

Step-by-step explanation:

The street sign is composed of two rectangles and 1 triangle.

Painted area = area of triangle + area of rectangle 1 + area of square

✔️Area of triangle = ½bh

b = 15 in.

h = 8 in.

Area of triangle = ½*15*8 = 60 in.²

✔️Area of rectangle 1 = L*W

L = 50 in.

W = 6 in.

Area = 50*6 = 300 in.²

✔️Area of Square = s²

s = 15 in.

Area = 15² = 255 in.²

✅Painted area = 60 + 300 + 225 = 585 in.²

7 0

2 years ago

Find all points on the circle (x^2) + (y^2) = 676 where the slope is 5/12

borishaifa [10]

Implicit defferentation

remember that dy/dx y= dy/dx

so
take derivitive of both sides
$2x+2y \space\ \frac{dy}{dx}=0$
solve for $\frac{dy}{dx}$
minus 2x both sides
$2y \space\ \frac{dy}{dx}=-2x$
divide both sides by 2y
$\frac{dy}{dx}=\frac{-2x}{2y}$
$\frac{dy}{dx}=\frac{-x}{y}$

when is the slope equal to $\frac{5}{12}$
solve for $\frac{dy}{dx}=\frac{5}{12}$
$\frac{dy}{dx}=\frac{5}{12}$
$\frac{5}{12}=\frac{-x}{y}$
$5y=-12x$
$y=\frac{-12}{5}x$
find where the circle and this line intersects

substitute $\frac{-12}{5}x$ for y
$x^2+(\frac{-12}{5}x)^2=676$
$x^2+\frac{144}{25}x^2=676$
$\frac{25}{25}x^2+\frac{144}{25}x^2=676$
$\frac{169}{25}x^2=676$
times both sides by $\frac{25}{169}$
$x^2=100$
sqrt both sides, take positive and negative roots
x=+/-10

sub back

$y=\frac{-12}{5}x$
$y=(\frac{-12}{5})(10) \space\ or \space\ (\frac{-12}{5})(-10)$
$y=\frac{-120}{5} \space\ or \space\ \frac{120}{5}$
$y=-24 \space\ or \space\ 24$

the points are (10,-24) and (-10,24)

8 0

2 years ago

a man standing 20m from a tower estimates the angles of elevation of the top and bottom of a flagpole on the tower as 58° and 55

schepotkina [342]

60.56ft

You can get this by creating right triangles with the adjacent side as 20 and using the angles given. You can then find the opposite sides using tangents and then simply add them together. <span />

7 0

2 years ago

Please help me if you know it

Diano4ka-milaya [45]

Answer:

The answer is the third one

Step-by-step explanation:

I don't know the explanation I know the answer because I have that as my homework questionand my mom helped me I didn't know what she was saying but she said it is the third kne

8 0

2 years ago

For the function f(x)=2^x the y intercept is (0,1). What is the y intercept of the function y=a•2^x?

Alex787 [66]

Answer:a

Step-by-step explanation:

7 0

2 years ago