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
yanalaym [24]
2 years ago
7

Math question 6r + 7 = 13 +7r

Mathematics
1 answer:
uranmaximum [27]2 years ago
8 0

Step-by-step explanation:

6r + 7 = 13 + 7r

6r - 7r = 13 - 7

-1r = 6

r = 6/-1

r = -6

You might be interested in
DUE SOON PLS HELP: All of the points on the picture are on the same line. 1. Find the slope of the line. Explain your reasoning.
Dimas [21]

Answer:

Look below :)

Step-by-step explanation:

1. To find the slope of a line, we can use this expression: \frac{y2 - y1}{x2 - x1}

In order to use that expression, we need to use two points. The graph given only provides you with two complete points, so we'll use those.

(4, 4) = (x1, y1)  (12, 20) = (x2, y2)

Now we can input the values into the expression:

\frac{y2 - y1}{x2 - x1} = \frac{20 - 4}{12 - 4}

Let's solve for the slope:

20 - 4 = 16

12 - 4 = 8

\frac{16}{8}

To simplify 16/8 divide both the numerator and the denominator by 8:

16/8 = 2

8 = 1

You get 2/1 or just 2.

The slope of the line is 2.

2. To make an equation for the line, we'll use slope-intercept form, which is y = mx + b, where m is the slope and b is the y-intercept. We already know the value of the slope is 2, so now we need to find the y-intercept. We can find the y-intercept using a given point and the slope. In this example, I'll use the point (4, 4). Let's input the values into the equation:

y = mx + b

4 = 2(4) + b

Now let's solve for b:

4 = 8 + b

Subtract 8 from both sides to isolate the b:

4 - 8 = 8 - 8 + b

-4 = b

The y-intercept of the equation is -4.

Now that we know the values for the slope and y-intercept, we can write the equation:

y = 2x - 4

3. To find the values of a and b, we can use the equation we made in the previous question.

First we'll find a:

The point we are given is (a, 16). We know the y-value is 16, so we can put that into our equation. We can also replace x with a:

y = 2x - 4

16 = 2a - 4

Now we can solve for a:

First, add 4 to both sides to isolate the 2a:

16 + 4 = 2a - 4 + 4

20 = 2a

Then divide both sides by 2 to isolate a:

20/2 = 2a/2

10 = a

The value of a is 10.

Now let's find b:

This is similar to finding a. The point we are given is (8, b). We know the value of x is 8, and we can replace y with b in the equation:

y = 2x - 4

b = 2(8) - 4

Let's solve:

b = 2(8) - 4

b = 16 - 4

b = 12

The value of b is 12.

4. Finally, to find the y- coordinate when x=0, all we have to do is input 0 in for x in the equation and then solve for y:

y = 2x - 4

y = 2(0) - 4

y = 0 - 4

y = -4

When x = 0, y = -4.

The answer for what the y-coordinate is when x = 0 will always be the value of the y-intercept.

I hope this helps!

8 0
3 years ago
Read 2 more answers
Andre drew a quadrilateral with four right angles and two pairs of congruent sides. What type of quadrilateral did he draw? Expl
Kaylis [27]

Answer:

The type of quadrilateral is a rectangle

Step-by-step explanation:

we know that

A rectangle is a quadrilateral with four right angles and two pairs of congruent and parallel sides

see the attached  figure to better understand the problem

m

AB=CD

BC=AD

therefore

The type of quadrilateral is a rectangle

6 0
3 years ago
What are the co-ordinates meant to be for the graph ... I need answers fast but if you want to be an extra help go on my maths w
Yuki888 [10]

Answer:

Step-by-step explanation:

7 0
3 years ago
Please help me I will mark brainliest. I’m just double checking to make sure I got it correct
ycow [4]

Answer:

the length of c is 18.43909

Step-by-step explanation:

pythagorean therorem

3 0
2 years ago
A display case of shirts are marked 10 for $31. If Opal wants to buy 120 shirts, how much will Opal spend (not including tax)?
Lemur [1.5K]
If the shirts all cost the same you would do 120 divided by 10 and that’s 12.you then multiple 31 by 12 and you get 372 so d
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the range of Variable B? Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable A. Th
    11·1 answer
  • Which of the following algebraic expressions will translate “the sum of eight and twice w”?
    14·2 answers
  • How do you write 0.0000248 in scientific notation?
    10·2 answers
  • What is the solution to this system of linear equations?
    6·1 answer
  • What is the volume please explain your answer
    8·1 answer
  • Answer this for brainiest:)
    5·1 answer
  • What number can go into 48 and 24
    9·1 answer
  • The 6 officers of the Student Council are going on a trip to an amusement park. Each student must pay an entrance fee plus $5 fo
    7·1 answer
  • Find the slope of the line that passes through (8, 4) and (5, 2).
    9·2 answers
  • PLEASE HELP!! WILL GIVE BRAINLIST!!!!! I NEED THIS ASAP
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!