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mihalych1998 [28]

3 years ago

10

Jane purchased a prepaid phone card for $30. Long distance calls cost 8 cents a minute. Jane used her card only once to make a l

ong distance call. If the remaining credit on her card is $26.48, how many minutes did her call last?

1 answer:

Pavlova-9 [17]3 years ago

7 0

30$ - 26.48$ = 3.52$

3.52$ / 0.08$ = 44 minutes

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Viktor [21]

cos(180-x)=-cosX

$\\ \rm\Rrightarrow tan^2135-cosec^260=-xcos45.sin45.cot60$

$\\ \rm\Rrightarrow (-1)^2-(\dfrac{2}{\sqrt{3}})^2=-\dfrac{x}{\sqrt{2}}\times \dfrac{1}{\sqrt{2}}\times \dfrac{1}{\sqrt{3}}$

$\\ \rm\Rrightarrow 1-\dfrac{4}{3}=\dfrac{-x}{2\sqrt{3}}$

$\\ \rm\Rrightarrow \dfrac{3-4}{3}=\dfrac{-x}{2\sqrt{3}}$

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4 0

3 years ago

In the figure below, if segment BC = 12 cm and segment AD = 2x + 4, then x = 5.

shtirl [24]

The answer would be false.

Since the figure above is a square, that would mean all sides are equal size. If x=5, that would make segment AD bigger than segment BC.

3 0

3 years ago

The Colosseum in Rome, Italy, is about 1,950 years old. The Giza Pyramids in Cairo, Egypt, are about 2,550 years older. How old

andrezito [222]

Answer: 2550

Step-by-step explanation:

it literally says it in the question

3 0

2 years ago

Read 2 more answers

Find the geometric mean between each pair of numbers.40 and 15

kirill [66]

Given a N quantity of numbers, the Geometric Mean is equal to the N-th root of product of the N numbers

In this case, we have two numbers, then we need to multiply them and take square root:

$\sqrt{40\cdot15}=\sqrt[]{600}=\sqrt[]{100\cdot6}=\sqrt[]{100}\cdot\sqrt[]{6}=10\sqrt[]{6}$

The answer is:

10√6

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8 0

1 year ago

A visual-effects model maker for a movie draws a spaceship using a ratio of 1 : 24. The drawing of the spaceship is 22 inches lo

Kay [80]

Answer:

Length of spaceship in movie = 528

Step-by-step explanation:

Given that:

Drawing ratio of spaceship = 1 : 24

It means that 1 inch on drawing equals 24 inches in movie

Drawing of spaceship = 22 inches

Length of spaceship in movie = x

As the relationship is proportional,

1 : 24 :: 22 : x

Product of mean = Product of extreme

24*22 = x

x = 528

Hence,

Length of spaceship in movie = 528

8 0

3 years ago