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Marizza181 [45]

3 years ago

12

The total cost for 25 students to go to the zoo is $56. The total cost for 25 students to go to the science museum is $48.25. Ho

w much money would the school save by going to the museum?

1 answer:

Daniel [21]3 years ago

6 0

Answer:

$7.75

Step-by-step explanation:

You would subtract 48.25 from 56 (56-48.25) to get the answer.

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HELPPP, i did it but i’m not sure if it’s right thank uu

lozanna [386]

You have the correct sequence of reasons

Here's what the full step by step picture looks like

3.25(1.25x + 0.5) = 10.5 ................ given

4.0625x + 1.625 = 10.5 ................ distributive property

4.0625x = 8.875 ................ subtraction property of equality

x = 2.18461538461539 ....... division property of equality

---------------------------

Notes:

The decimal value of x is approximate. Round it however you need.
In the third step, we subtracted 1.625 from both sides
In the fourth step, we divide both sides by 4.0625

6 0

3 years ago

Read 2 more answers

Can someone help with this please

crimeas [40]

Answer:

$3^2$

Step-by-step explanation:

$\frac{3^8*\:3^4}{3^2*\:3^8}$

Apply Exponent rule: $a^b\cdot \:a^c=a^{b+c}$

$\frac{3^{12}}{3^8* \:3^2}$

$\frac{3^{12}}{3^{10}}$

Apply exponent rule: $\frac{x^a}{x^b}=x^{a-b}$

$3^{12-10}=3^2$

5 0

4 years ago

Read 2 more answers

Rewrite the equation C = 2nr to show the expression that can be used to find the value of r.

STatiana [176]

The process is:

C = 2nr

2nr = c

r (2n) = c

$r = \frac{c}{2n}$

That's the answer☝️☝️☝️☝️

or maybe this one

r = 2n + c

sorry, I'm unsure, it has been too long since I studied that...

5 0

3 years ago

Read 2 more answers

A survey conducted in July 2015 asked a random sample of American adults whether they had ever used online dating (either an onl

Natasha2012 [34]

Answer:

The 99% confidence interval is (0.0787, 0.1613).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

The survey included 411 adults between the ages of 55 and 64, and 50 of them said that they had used online dating. This means that $n = 411, \pi = \frac{50}{411} = 0.12$

The 99% confidence interval is

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 - 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.0787$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 + 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.1613$

The 99% confidence interval is (0.0787, 0.1613).

3 0

4 years ago

Which triangles are similar by the angle-angle criterion for similarity of triangles ?

Alex Ar [27]

Answer:

Option D is correct.

$\triangle ADE \sim \triangle ABC$

Step-by-step explanation:

In triangle ADE and triangle ABC

From the figure:

$\angle ADE = \angle ABE$ [Angle] [Given]

$\angle DAE = \angle BAC$ [Angle]

AA(Angle-Angle) similarity criterion states that in two triangles if two pairs of corresponding angles are equal, then these triangle Similar.

By AA similarity:

⇒ $\triangle ADE \sim \triangle ABC$

5 0

4 years ago