1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elanso [62]
3 years ago
12

At Joyce's school, tickets for a concert were sold at the rate of 40 per half hour. How many tickets were sold in 7 hours

Mathematics
2 answers:
erik [133]3 years ago
6 0
170 tickets were sold
oee [108]3 years ago
4 0
560 tickets would be sold in 7 hours. To get the amount every hour we double 40 to get 80. To get 7 hours, we multiply 80 by 7, giving us 560.
You might be interested in
Really need help! Brainliest to correct!
zlopas [31]

Answer:

<u>Given</u>:

  • R(x) = 59x - 0.3x²
  • C(x) = 3x + 14

<u>Find the following</u>:

  • P(x) = R(x) - C(x) = 59x - 0.3x² - 3x - 14 = -0.3x² + 56x - 14
  • R(80) = 59(80) - 0.3(80²) = 2800
  • C(80) = 3(80) + 14 = 254
  • P(80) = 2800 - 254 = 2546
7 0
2 years ago
Exterior angles of triangles: help me find the value of x please
Tasya [4]

your picture is not showing up for me

3 0
2 years ago
Read 2 more answers
What is the momentum of 200kg portable if it travels 50 meters in 5seconds
kvasek [131]
Momentum  = mass * velocity

50 meters in 5 seconds = 50/5  = 10 m / second

Required momentum  = 200*10  = 2,000 

I cant remember how to write the units for this.
5 0
2 years ago
If you want to be 95​% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard
Aleksandr [31]

Answer:

The sample size required is at least 171

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

What sample size is​ required?

A samle size of at least n is required, in which n is found when M = 3, \sigma = 20

So

M = z*\frac{\sigma}{\sqrt{n}}

3 = 1.96*\frac{20}{\sqrt{n}}

3\sqrt{n} = 20*1.96

\sqrt{n} = \frac{20*1.96}{3}

(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}

n = 170.7

Rouding up

The sample size required is at least 171

5 0
2 years ago
Ryan works at at the donut shop where he makes $10.25 per hour . He also works part time at the school bookstore where he makes
SCORPION-xisa [38]

Answer:

6 hours

Step-by-step explanation:

Let

x----> the number of hours worked at the donut shop

y----> the number of hours worked at the school bookstore

we know that

x+y=20

x=20-y -----> equation A

10.25x+8.75y=196 -----> equation B

Substitute equation A in equation B and solve for y

10.25(20-y)+8.75y=196

205-10.25y+8.75y=196

10.25y-8.75y=205-196

1.5y=9

y=6 hours at the school bookstore

7 0
3 years ago
Other questions:
  • How to divide u by v, subtract t from the result, then add w to what you have. I don't understand
    6·2 answers
  • SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet users. Fin
    10·1 answer
  • There are two coins in a bag. for coin 1, p(h) = ½ and for coin 2, p(h) = 1/3. your friend chooses one of the coins at random an
    14·1 answer
  • What re the answers to 20-30
    13·1 answer
  • The diameter of the moon is about 3,476 kilometers. The distance from Earth to the moon is about 384,400 kilometers.About how ma
    8·2 answers
  • The bases of an isosceles trapezoid are represented by 4x and 2x.. The height of the trapezoid is represented by (x − 6). Which
    9·2 answers
  • How to do Simplification of algebraic fractions
    13·1 answer
  • What is 6P4?<br> 15<br> 24<br> 360<br> 720
    10·2 answers
  • Angles in a triangle are 60, 85, and Y degrees what is the value of Y?
    8·1 answer
  • I neep help!!! what is the answer???
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!