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
densk [106]
4 years ago
5

How do I solve this system using substitution: y = x - 7 ; 2x + y = 8

Mathematics
2 answers:
dalvyx [7]4 years ago
8 0
Y=x-7
2x+y=8
2x+x-7=8
3x=15
x=15/3
x=5
y=x-7
y=5-7
y=-2

x=5
y=-2
Rudiy274 years ago
7 0
Y = x - 7
2x + y = 8

2x + (x - 7) = 8
  2x + x - 7 = 8
        3x - 7 = 8
        <u>    + 7 + 7</u>
             <u>3x</u> = <u>15</u>
              3      3
               x = 5
y = x - 7
y = 5 - 7
y = -2
(x, y) = (5, -2)
You might be interested in
Two ships leave port at the same time. Ship A sails north at a speed of 10 mph while ship B sails east at a speed of 35 mph. Fin
blondinia [14]

Answer:

  d = (5√53)t

Step-by-step explanation:

After 1 hour, A is 10 miles north of the port, and B is 35 miles east of the port. Since these directions are at right angles, the Pythagorean theorem can be used to find the distance between the ships:

  d = √(10² +35²) = √(100 +1225) = √1325 = 5√53 . . . . miles

The distance between the ships is increasing this number of miles each hour, so the desired expression is ...

  d = (5√53)t ≈ 36.4t

3 0
4 years ago
Please help me with this
aliya0001 [1]

Hey!

--------------------------------------------------------

a. Has a vertical axis of symmetry.

Answers: B and D

--------------------------------------------------------

b. Has a horizontal axis of symmetry.

Answers: D and E

--------------------------------------------------------

c. Passes through exactly one quadrant.

Answers: A and D

--------------------------------------------------------

d. Passes through all 4 quadrants.

Answers: B and F

--------------------------------------------------------

Hope This Helped! Good Luck!

7 0
3 years ago
how much money will you have in 10 years if you invest $12,000 at a 3.3% annual rate of interest compounded quarterly?
Andrej [43]

Answer:

The amount is $16718.7 and the interest is $4718.7.

Step-by-step explanation:

STEP 1: To find amount we use formula:

A=P(1+rn)n⋅t

A = total amount

P = principal or amount of money deposited,

r = annual interest rate

n = number of times compounded per year

t = time in years

In this example we have

P=$12000 , r=3.33% , n=4 and t=10 years

After plugging the given information we have

AAAA=12000(1+0.03334)4⋅10=12000⋅1.00832540=12000⋅1.393225=16718.7

STEP 2: To find interest we use formula A=P+I, since A=16718.7 and P = 12000 we have:

A16718.7II=P+I=12000+I=16718.7−12000=4718.7

4 0
4 years ago
The cost of manufacturing A certain type of headphone varies inversely as the number of headphones increase . If 5000 headphones
amm1812
Why are the Fundamental Orders of Connecticut important?
8 0
3 years ago
Simplify the expression. Show your work. -5 x 1 x 11 x 4
Mrac [35]

Are those multiplications signs or x variables?

4 0
3 years ago
Read 2 more answers
Other questions:
  • Measure the height and arm span (from finger-tip to finger-tip) from 12 people in inches. I need 12 people, but it if you can gi
    10·1 answer
  • What is the value of a in the equation 5 a minus 10 b equals 45, when b equals 3?
    10·1 answer
  • Convert 1927 from military time to regular time
    9·1 answer
  • What is the answer to this question someone help pls: Find three consecutive integers whose sum is -30
    9·1 answer
  • If 12 is replaced with 3 in the following set what will happen with the value of the range 28,45,12,34,36,45,19,20
    5·2 answers
  • Kaylie had $1250 in her savings account. She withdrew $82 each month for 8 months in order to pay for a summer vacation. How muc
    12·2 answers
  • It Says On My Sheet "Wright Each Product Using An Exponent" 6x6?
    15·1 answer
  • What is the volume of a cylinder with base radius 2<br> and height 9?
    10·2 answers
  • Backk from ban!!!!!!!!
    15·1 answer
  • There are 60 people waiting for a river raft ride. Each raft holds
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!