Ask question

Ask question

All categories

2 years ago

14

miguel and 3 of his friends went to the movies. they originally had a total of 40 dollars. each boy gad the same amount of money

and spent $7.50 on a ticket. how much money did each boy have left after buying a ticket?

2 answers:

MAVERICK [17]2 years ago

6 0

$2.50

$40.00 divided by 4 friends equals $10.00 each.
$10.00- $7.50= $2.50

NARA [144]2 years ago

5 0

They all had 32.50 dollars

You might be interested in

Which term has a degree of 8?

poizon [28]

Answer:

A. -2x^3y5 has a degree of 8

Step-by-step explanation:

Calculator :-)

8 0

2 years ago

How do I find the answer to the problem -1/2=y-1

Ann [662]

Answer:

y=1/2

Step-by-step explanation:

y-1=-1/2 Switch sides

y-1+1=-1/2+1 Add 1 to both sides

y=1/2 Simplify

4 0

2 years ago

If x = a cosθ and y = b sinθ , find second derivative

Olin [163]

I'm guessing the second derivative is for <em>y</em> with respect to <em>x</em>, i.e.

$\dfrac{\mathrm d^2y}{\mathrm dx^2}$

Compute the first derivative. By the chain rule,

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\mathrm dy}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}$

We have

$y=b\sin\theta\implies\dfrac{\mathrm dy}{\mathrm d\theta}=b\cos\theta$

$x=a\cos\theta\implies\dfrac{\mathrm dx}{\mathrm d\theta}=-a\sin\theta$

and so

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{b\cos\theta}{-a\sin\theta}=-\dfrac ba\cot\theta$

Now compute the second derivative. Notice that $\frac{\mathrm dy}{\mathrm dx}$ is a function of $\theta$ ; so denote it by $f(\theta)$ . Then

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm dx}$

By the chain rule,

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm df}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}$

We have

$f=-\dfrac ba\cot\theta\implies\dfrac{\mathrm df}{\mathrm d\theta}=\dfrac ba\csc^2\theta$

and so the second derivative is

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac ba\csc^2\theta}{-a\sin\theta}=-\dfrac b{a^2}\csc^3\theta$

4 0

2 years ago

Quick algebra 1 question for 10 points!

Mars2501 [29]

The factors of the given quadratic expression, 2x² - 4x - 16, are 2, (x +2), and (x -4)

<h3>Factoring a Quadratic expression </h3>

From the question, we are to determine the each of the factors of the given quadratic expression

The given quadratic expression is

2x² - 4x - 16

Factoring

2x² - 4x - 16

First, factor out 2

That is,

2(x² - 2x - 8)

Now, we will factor x² - 2x - 8
x² - 2x - 8

x² - 4x + 2x - 8

x(x - 4) +2(x -4)

(x +2)(x -4)

Thus,

2x² - 4x - 16 = 2(x +2)(x -4)

Hence, the factors of the given quadratic expression, 2x² - 4x - 16, are 2, (x +2), and (x -4)

Learn more on Factoring a quadratic expression here: brainly.com/question/52959

#SPJ1

6 0

5 months ago

Read 2 more answers

Hey guys! I am having trouble with this question and would love it if someone would explain to me step-by-step how to get the an

Lady_Fox [76]

Answer:

Sorry if my hand writing is bad. I didnt have a calculator for c so idk what it is

5 0

2 years ago