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
levacccp [35]
3 years ago
7

, write equivalent ratios that represent the situation and solve. 12. Angela pays $120 for 4 piano lessons. How much does she pa

y for 8 piano lessons?
Mathematics
1 answer:
nata0808 [166]3 years ago
8 0

Answer:

She pays $240 for 8 lessons.

Step-by-step explanation:

We need to set up equivalent ratios so we can cross-multiply and solve for x, the amount Angela pays for 8 lessons. Make sure to have both the costs in the numerator, and the number of lessons in the denominator. If you mix it up, this won't work.

\frac{120}{4} = \frac{x}{8}

Cross-multiply:

120*8 = 4x

Solve for x:

960 = 4x

960/4 = x

<u>x = $240</u>

You might be interested in
If two polynomial equations have real solutions, then will the equation that is the result of adding, subtracting, or multiplyin
kirill115 [55]

No. A polynomial equation in one variablel ooks like P(x) = Q(x), where P and Q are polynomials.

Consider polynomial equations x^2 = 3 and x^2 = 1.

Obviously they have real solutions.

Subtract the two polynomial equations:

(x^2 - x^2) = (3 - 1)

0 = 2...

We get the polynomial equation 0 = 2. We call this a polynomial equation because single constants are also by definition polynomials.

Obviously 0 = 2 has no real solution.

3 0
3 years ago
The measure of angle ABD is 105º. The measure of angle ABC is 75º.
MakcuM [25]

If we know that the WHOLE angle added is 105 and only part is 75 you need to subtract the whole angle and subtract from part of the whole angle.

105-75=30. You get 30 And that’s you answer!

Picture to help with your understanding.

5 0
3 years ago
What is (x+2)(x+5) in polynomial standard form
Harlamova29_29 [7]

Answer:

=x^2+7x+10

Step-by-step explanation:

Simplify: xx+5x+2x+2.5: x+7x+10

Add similar elements: 5x+2x= 7x

=xx+7x+2.5

xx=x2

2.5=10

=x+7x+10

Answer: =x^2+7x+10

<em><u>Hope this helps.</u></em>

3 0
3 years ago
Lydia's claims that when she subtracts two negative integers, the result is always positive. Is she correct? Explain.
aleksley [76]
She is correct because a negative subtracted by a negative is positive.
8 0
3 years ago
Read 2 more answers
Standard deviation of a normal data distribution is a _______. Group of answer choices
FrozenT [24]

Answer:

Standard deviation of a normal data distribution is a measure of data dispersion.

Step-by-step explanation:

Standard deviation is used to measure dispersion which is present around the mean data.

The value of standard deviation will never be negative.

The greater the spread, the greater the standard deviation.

Steps-

1. At first, the mean value should be discovered.

2.Then find out the square of it's distance to mean value.

3.Then total the values

4.Then divide the number of data point.

5.the square root have to be taken.

Formula-

SD=\sqrt{\frac{(\sum{x-x)^2}  }{n-1}

   Advantage-

It is used to measure dispersion when mean is used as measure of central tendency.

5 0
3 years ago
Other questions:
  • 12 foot tall street light is making a 18 foot shadow at the same time a nearby building is making a 72 feet shadow. How y’all
    9·1 answer
  • the group hiked a total of 17.4 miles on the first day. on the second day that group Heights a distance 12% more than the total
    5·1 answer
  • How many feet are shorter than 20 centermeters
    8·2 answers
  • Tanner is installing a new door and knows that the length of the door is 10 inches less than three times the width. Select the e
    7·2 answers
  • Hurry &amp; Please Help!!
    10·1 answer
  • Calculate the angle between (2,2,4) and (2,-1,1). The result is a familiar angle, so the answer is to be given exactly.
    10·1 answer
  • Help please i rlly need the answers as soon as possible
    11·2 answers
  • How much would $125 invested at 8% interest compounded
    9·2 answers
  • Solve for x in this equation.<br> 7^3x-17 = 49^x
    9·2 answers
  • Help me out, I will give you brainliest, help me in this math problem please thanks​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!