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
bixtya [17]
3 years ago
12

A direct variation includes the points (21,7) and (27,Y. Findvalue of y.​

Mathematics
1 answer:
rjkz [21]3 years ago
3 0

Answer:

13

Step-by-step explanation:

5 has been added by the 21 to make 27 to leave with adding 5 to old y and leaving the new variable y 13

You might be interested in
The equation of the line is 3y+2x=12 . what is the slope of the line perpendicular to this equation?
Ket [755]
The slope
\frac{3}{2}
6 0
3 years ago
Read 2 more answers
River C is 400 miles longer than River D. If the sum of their lengths is 5,590 miles, what is the length of each river?​
pychu [463]

Answer:

River C is: 2,965 miles long.

River D is: 2,565 miles long.

Step-by-step explanation:

C=400+D\\C+D=5530

Have a great day! ^^

7 0
3 years ago
Please help with algebra!!! ill give brainliest
sattari [20]
Hello :) please refer to the pic below!

7 0
2 years ago
Read 2 more answers
Our current equation is:
inessss [21]

Answer:

C

Step-by-step explanation:

subtracting 289 from both sides, will make one side will be equal to zero.

thus we can then easily solve for b.

can this answer get the brainliest tag?

8 0
3 years ago
Find the product of all real values of r for which 1/2x=r-x/7
Dahasolnce [82]

Answer:

r = \±\sqrt{14

Product = -14

Step-by-step explanation:

Given

\frac{1}{2x} = \frac{r - x}{7}

Required

Find all product of real values that satisfy the equation

\frac{1}{2x} = \frac{r - x}{7}

Cross multiply:

2x(r - x) = 7 * 1

2xr - 2x^2 = 7

Subtract 7 from both sides

2xr - 2x^2 -7= 7 -7

2xr - 2x^2 -7= 0

Reorder

- 2x^2+ 2xr  -7= 0

Multiply through by -1

2x^2 - 2xr +7= 0

The above represents a quadratic equation and as such could take either of the following conditions.

(1) No real roots:

This possibility does not apply in this case as such, would not be considered.

(2) One real root

This is true if

b^2 - 4ac = 0

For a quadratic equation

ax^2 + bx + c = 0

By comparison with 2x^2 - 2xr +7= 0

a = 2

b = -2r

c =7

Substitute these values in b^2 - 4ac = 0

(-2r)^2 - 4 * 2 * 7 = 0

4r^2 - 56 = 0

Add 56 to both sides

4r^2 - 56 + 56= 0 + 56

4r^2 = 56

Divide through by 4

r^2 = 14

Take square roots

\sqrt{r^2} = \±\sqrt{14

r = \±\sqrt{14

Hence, the possible values of r are:

\sqrt{14 or -\sqrt{14

and the product is:

Product = \sqrt{14} * -\sqrt{14}

Product = -14

8 0
3 years ago
Other questions:
  • Can someone please help me
    7·1 answer
  • Jane and Julie went into business together. Jane contributed $10,000 and Julie contributed $6,000.
    10·1 answer
  • How can 32 over 6 be expressed as a decimal?
    14·2 answers
  • the sum of the measure of angle x and angle y is 90 if the measure if angle x is 30 lessthan twice the measure of angle y what i
    7·1 answer
  • A pile of newspapers Mc Grath's class was 17 3/4 inches high.
    14·1 answer
  • 9s − 5 s = 8
    10·1 answer
  • Find the median for the given set of data.
    10·1 answer
  • The sum of two numbers is 361 and the difference between the two number is 173 what are the two numbers
    15·2 answers
  • Https://m.eet.go.ogle.com/tjc-pyur-uqo anyone can join ^3^
    6·1 answer
  • The side lengths of a right triangle are 10, 26, and 24. Which is the hypotenuse?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!