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
Grace [21]
2 years ago
12

In two or more complete sentences write and solve an equation for the situation and explain how you will solve the equation. Fif

ty students were given a pre and post test for their math course. Overall, most students increased their scores by 20% points. The grades on the post test went up to 95%. What is the starting range for the grades on the test?
Mathematics
1 answer:
miv72 [106K]2 years ago
6 0

We conclude that the starting average grade is 79.17%

<h3>How to write the equation and solve it?</h3>

There are 50 students, let's say that the grades are measured between 1% and 100%.

And the average grade of the 50 students is A.

We know that after it increased by 20%, the average of the grades is 95.

Then we just need to solve the percentage equation:

95 = A*(1 + 20%/100%) = A*(1.2)

95/1.2 = A = 79.17

We conclude that the starting average grade is 79.17%

If you want to learn more about percentages:

brainly.com/question/843074

#SPJ1

You might be interested in
When solving the system of equations by graphing, what is the solution of 3x + 2y = 2 and 2x – y=6?
oksian1 [2.3K]

Answer:

answer B: (2,-2)

Step-by-step explanation:

First, write the equations on top of each other:

3x+2y=2\\2x-y=6

Then, multiply the the second equation by 2 so that we can use elimination of the y-variable:

3x+2y=2\\2(2x-y)=2(6)\\\\3x+2y=2\\4x-2y=12

Next, use elimination to find the value of "x":

3x+2y=2\\+(4x-2y=12)\\\\7x+0=14\\7x=14\\\frac{7x}{7}=\frac{14}{7}\\x=2

So, your x-value is 2.

Now, substitute your x-value into one of your equations, let's take the second equation, 2x-y=6:

2x-y=6\\2(2)-y=6\\4-y=6\\4-4-y=6-4\\-y=2\\\frac{-y}{1}=\frac{2}{-1}\\y=-2

Your y-value is -2.

With all your information gathered, you find that the solution to this system of equation is (2,-2).

5 0
3 years ago
7. Danielle went to the grocery store to buy pies for a family dinner. The manager told her they were having a sale in which she
yaroslaw [1]
No; this is not the right business move
8 0
3 years ago
Using the distributive property,simplify the following: 5(x+2)
MArishka [77]
The answer is 5x + 10 because you have to times 5 by everything in the parenteses
3 0
4 years ago
What does measuring the spread of a data set tell us, and why is that significant?
Ann [662]

Step-by-step explanation:

Measure of spread is used in describing the variability in a sample.

Examples of measure of spread are: Mean, Median and Mode.

A measure of spread helps in giving an idea of how well the mean, or mode, or median, whichever of the three measure of spreads we use, represents the data under consideration. If the spread of values in the data set is large, that means there a lot of variation between the values of the data set. It is always better to have a small spread.

5 0
3 years ago
Read 2 more answers
A car can travel 234 miles on 26 gallons of gasoline. How far can it travel on 51 gallons?
castortr0y [4]

Answer:

459 Miles

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Write the ratios for sin A and cos A. Need help.
    13·1 answer
  • Plzzzzz help !.!.!.!.!.!.!!..!!.!.!.!.!.!.?
    6·2 answers
  • Name a fourth point in plane ZWU.
    14·1 answer
  • ​f(x)
    14·1 answer
  • Is algebra.
    7·1 answer
  • A fair six-sided die is thrown four times Find the probability, correct to three decimal places, of getting
    8·1 answer
  • Oshua's mother has a family Christmas gathering at 2:00. Joshua must travel 348 miles to join the festivities. He left his house
    10·1 answer
  • Which Statement about 4(x-3) is True?
    15·2 answers
  • In a group of 700 people only 5% of them have red hair how many people hade red hair
    8·1 answer
  • Adana has 4 skirts, 3 blouses, and
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!