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
tensa zangetsu [6.8K]
3 years ago
12

If x+3y=7 and x-3y=1 what's y

Mathematics
1 answer:
vazorg [7]3 years ago
6 0

Subtract one equation from the other to eliminate <em>x</em> :

(<em>x</em> + 3<em>y</em>) - (<em>x</em> - 3<em>y</em>) = 7 - 1

6<em>y</em> = 6

<em>y</em> = 1

You might be interested in
2/5y - 4 + 7 - 9/10y with steps
Lesechka [4]

Let's simplify step-by-step.

2/ 5 y−4+7− 9 /10 y = 2 /5 y+−4+7+ −9 /10 y

Combine Like Terms:  = 2 /5 y+−4+7+ −9 /10 y

(2 /5 y+ −9 /10 y)+(−4+7) = −1 /2 y+3

Answer:  = −1 /2 y+3

Hope I could help! :)

3 0
3 years ago
Pleaseee help <br><br> What choices are real numbers? Check all that apply.
7nadin3 [17]

Answer:

what  you arest mine but the other one says no answer what

Step-by-step explanation:

6 0
3 years ago
How do you solve these type of problems ?
-Dominant- [34]

Answer:

x = 15

Step-by-step explanation:

This involves the Secant and Segments Theorem.

8(19 + 8) = 9(9 + x)

216 = 81 + 9x

9x = 135

x = 15

8 0
3 years ago
Kite E F G H is inscribed in a rectangle. Points F and H are midpoints of sides of the rectangle, and creates a side length of x
Hoochie [10]

Answer:

5 units

Step-by-step explanation:

Let point O be the point of intersection of the kite diagonals.

|OF| = 2, |OH| = 5

|FH| = |OF| + |OH| = 2 + 5 = 7

FH and EG are the diagonals of the kite. Hence the area of thee kite is:

Area of kite EFGH = (FH * EG) / 2

Substituting:

35 = (7 * |EG|) / 2

|EG| * 7 = 70

|EG| = 10 units

The longer diagonal of a kite bisects the shorter one, therefore |GO| = |EO| = 10 / 2 = 5 units

x = |GO| = |EO| = 5 units

7 0
3 years ago
Read 2 more answers
Suppose y varies directly with x. If y = -4 when x = 8, what is the equation of direct variation?
tresset_1 [31]

\bf \qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby \begin{array}{llll} k=constant\ of\\ \qquad variation \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \textit{we also know that }~~ \begin{cases} y=-4\\ x=8 \end{cases}\implies -4=k(8)\implies \cfrac{-4}{8}=k\implies -\cfrac{1}{2}=k \\\\[-0.35em] ~\dotfill\\\\ ~\hfill y=-\cfrac{1}{2}x~\hfill

8 0
3 years ago
Read 2 more answers
Other questions:
  • How many perpendicular lines must be drawn in a triangle to prove the Law of Sines?..is it 2, 1,0, or 3..Explain
    15·1 answer
  • jill is making a quilt in the shape of a right triangle. the measurement of the diagonal of the quilt is 36 inches long. the wid
    13·1 answer
  • On January 1, 1970, Los deposited $1950 into a savings account paying 6.6% interest, compounded semiannually. If she hasn't made
    14·2 answers
  • Two step equations that equal 14
    11·1 answer
  • Find the slope of the line through each pair of points.<br><br> (16, -5), (7, -20)
    7·1 answer
  • (2,-4) is reflected across the x-axis. what are the coordinates of its image?
    12·2 answers
  • Help!
    12·1 answer
  • Which polynomial was factored? x2 – 2x – 8 x2 + 2x – 8 x2 – 2x – 4 x2 + 2x – 4
    11·2 answers
  • Help me pretty please
    7·2 answers
  • In a game, if you roll a 6 on a 6-sided number cube, you lose a turn. (a) What is the probability that you roll a 6? Explain you
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!