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
igomit [66]
3 years ago
15

Can someone help me?

Mathematics
1 answer:
zaharov [31]3 years ago
8 0

Answer:

Step 1: Combine like terms

Step 2: Distributive Property

Step 3: Addition Property Of Equality

Step 4: Multiplication property of equality

Step 5: Division property of equality

Step-by-step explanation:

You might be interested in
Two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students
Nezavi [6.7K]

Answer: A. 85.7

Step-by-step explanation:

Given : Two sections of a class took the same quiz.

Section A had 15 students who had a mean score of 80, and Section B had 20 students who had a mean score of 90.

We know that  , \text{Mean}=\dfrac{\text{Sum of observations}}{\text{No. of observations}}

Then , for section A :

\text{Mean score }=\dfrac{\text{Sum of scores in sec A}}{\text{No. of students}}

\Rightarrow\ 80=\dfrac{\text{Sum of scores in sec A}}{15}\\\\\Rightarrow\ \text{Sum of scores in sec A}=80\times15=1200

Similarly in Section B, \text{Sum of scores in sec B}=90\times20=1800

Total scores = Sum of scores in sec A+Sum of scores in sec B

=1200+1800=3000

Total students = Students in sec A +Students in sec B

=15+20=35

Now , the mean score for all of the students on the quiz =\dfrac{\text{Total score}}{\text{Total students}}

=\dfrac{3000}{35}=85.7142857143\approx85.7

Hence, the approximate mean score for all of the students on the quiz = 85.7

Thus , the correct answer is option A. 85.7.

7 0
2 years ago
line p contains points A(-7,-9) and B(4,0) line q is parallel to line p line r is perpendicular to line q what is the slope of l
igomit [66]
Use the slope formula (y2-y1)/(x2-x1)
(0+9)/(4+7)=9/11
Since q is parallel to r the slope will be the same. 9/11 is the slope of line r
4 0
3 years ago
What ordered pair is a solution for y-4=7(x-6)
777dan777 [17]

The ordered pair (6 , 4) is a solution for y - 4 = 7(x - 6)

Step-by-step explanation:

The point-slope form of a linear equation is:

y-y_{1}=m(x-x_{1}) , where

  • m is the slope of the line
  • (x_{1},y_{1}) is a point on the line

Any point on the line is a solution for the equation of the line

The solution of an equation is the values of x and y which make the left hand side is equal to the right hand side

∵ The equation is y - 4 = 7(x - 6)

- Compare the equation by the point-slope form above

∴ m = 7

∴ x_{1} = 6 and y_{1} = 4

- That means point (6 , 6) lies on the line

∴ Point (6 , 4) is a point on the line which represents the

   given equation

∵ Any point on a line is a solution of the equation of that line

∴ (6 , 4) is a solution of the equation

The ordered pair (6 , 4) is a solution for y - 4 = 7(x - 6)

Learn more:

You can learn more about the linear equations in brainly.com/question/1284310

#LearnwithBrainly

8 0
3 years ago
25 points!!<br> how are these shapes alike
Pie

Answer:

A. Each shape has 12 edges

Step-by-step explanation:

A is the only one that is true.

The shapes have 6 faces, not 7 or 8.

The edges are the places were two planes intersect, and there are 12, not 6.

7 0
3 years ago
Read 2 more answers
24. The function f(t) = -16t^2 +20t +4 gives the height of a ball, in feet, t seconds after it is tossed.
NeX [460]

Answer:

-12 feet per second

Step-by-step explanation:

average rate of change over [0.75, 1.25] = \frac{f(1.25) - f(0.75)}{1.25 - 0.75}

f(1.25) - f(0.75) = 4 - 10 = -6

1.25 - 0.75 = 0.5

\frac{f(1.25) - f(0.75)}{1.25 - 0.75} = \frac{-6}{0.5} = -12

7 0
3 years ago
Read 2 more answers
Other questions:
  • Make sure it's fully reduced.<br><br> 2 - x = 5/8
    10·1 answer
  • Use the net to find the surface area of the prism
    6·2 answers
  • Graph this parametric equation<br><br> x = 2t y = t + 5, -2 ≤ t ≤ 3
    11·1 answer
  • manny's father bought a box of miniature candy bars for him. his mother limited the number of candy bars he could eat each day.
    10·1 answer
  • Is this a polynomial, if so whats the degree
    14·1 answer
  • Yall please answer quickly, I will give brainliest!! Merry Christmas, Happy Hanukkah, and Happy Kwanzaa!
    5·1 answer
  • Jake is constructing a triangle. He drew a side length that is 8 inches long and another side length that is 13 inches long. Whi
    12·1 answer
  • Help me with this please!!
    15·1 answer
  • This is so confusing, pls help!!
    10·1 answer
  • What is the range of the function {(0, 15), (4, 6), (6, 4), (8, 0)}?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!