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
amid [387]
3 years ago
13

- 5x + 2y = 9 y = 7x

Mathematics
1 answer:
Lorico [155]3 years ago
8 0

Answer:

<h2><u>x = 1</u></h2>

Explanation:

- 5x + 2y = 9

  • y = 7x
  • <u>Insert 7x For 'y'</u>

- 5x + 2(7x) = 9

  • <u>Remove Parenthesis</u>

-5x + 2 · 7x = 9

  • <u>Multiply: 2 · 7 = 14</u>

-5x + 14x = 9

  • <u>Add: -5x + 14x = 9x</u>

9x = 9

  • <u>Divide Both Sides By 9</u>

9x ÷ 9 = 9 ÷ 9

<h2><u>x = 1</u></h2>
You might be interested in
There are 23 perfect tests taken.
Grace [21]

Answer:

92%

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I will give Brainliest
ioda

Answer:

The volume(V) of gas will increase when the pressure of the gas decreases assuming all the other variables are held constant.

Step-by-step explanation:

 P = Pressure of the ideal gas

            V = Volume of the ideal gas

            n = Moles of the ideal gas

            R = Universal gas constant

            T = Temperature of the ideal gas

4 0
2 years ago
Read 2 more answers
1. Solve proportion 12/15 = 18/b
omeli [17]
We solve the as follows:

<span>1. Solve proportion 12/15 = 18/b
</span>( 12/15 = 18/b ) b<span>
( 12b/15 = 18 ) 15/12
b = 18(15/12)
b = 45/2

2. Solve equations 

A. -x + 4 = x +6 
</span>-x + 4 - x = x +6 - x
<span>-2x + 4 - 4 = 6 - 4
-2x = 2
x = -1

B. 5n + 7 =7(n+1) -2n 
5n + 7 = 7n + 7 - 2n
5n -7n + 2n = 7 - 7
0 = 0

C. -4(p+2) + 8 = 2(p-1) - 7p + 15
-4p - 8 + 8 = 2p - 2 - 7p + 15
-4p + 7p - 2p = -2 + 15 + 8 - 8
p =13

3. Solve a/b x - c = 0 for x 
</span>a/b x - c = 0 
( a/b x = c ) b/a
x = bc / a
3 0
3 years ago
A group of which of the order must be cyclic?<br><br> A. 6 <br> B. 7 <br> C. 8 <br> D. 9
DochEvi [55]

Answer:

Its option D. 9

mark me as brainlist

3 0
3 years ago
Need help please!
Readme [11.4K]

Answer:

4) v=kx^2/y^3

2= k(4^2)/(3^3)

2 =k16/27

k = 2(27/16) = 27/8

v = (27/8)(3^2)/(2^3 = (27/8)(9/8) = 243/64

v = 243/64 when x=3 and y=2

Step-by-step explanation:

here

5 0
2 years ago
Other questions:
  • 1.) A 20° sector in a circle has an area of 21.5π yd².
    9·1 answer
  • I need help fast! 20 pts
    9·2 answers
  • 16 increased by twice a number is -24
    8·1 answer
  • X y/x-y=1/2 solve for y
    5·1 answer
  • t is commonly assumed that babies are equally likely to come as either a boy or a girl. This is not true. Actually, about 51.3%
    8·1 answer
  • 5. What is the volume of the pyramid? *
    7·1 answer
  • QUES
    13·1 answer
  • What does 3x + 2x - 4 equal
    12·1 answer
  • C) Write 2400 000 in standard form.
    7·2 answers
  • In ΔBCD, the measure of ∠D=90°, the measure of ∠B=8°, and BC = 6.4 feet. Find the length of DB to the nearest tenth of a foot.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!