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
postnew [5]
3 years ago
12

Solve using the substitution method.

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
5 0

Answer:

x = 1, y = 4

Step-by-step explanation:

This is very simple

Since you have 2 equations with the same coefficient of x, just minus one equation from another:

          x + 3y = 13

       -      

          x + 2y = 9

                1y = 4

Sub y = 4 into any of the 2 equation,

x + 3(4) = 13

x + 12 = 13

x = 13 - 12

  = 1

You might be interested in
A right triangle has a hypotenuse of length 99 inches. if one angle is 34 degrees34°​, find the length of each leg.
Andreyy89
Sine (34) = opposite / 99
opposite side = .55919 * 99
opposite side = <span> <span> <span> 55.35981 </span> </span> </span>

Adjacent side² = 99² - 55.35981²
Adjacent side² = <span> <span> </span></span> <span> <span> <span> 9,801  </span> </span> </span> -<span><span><span>3,064.7085632361 </span> </span> </span>
<span><span><span>Adjacent side² = 6,736.29 </span> </span> </span>
Adjacent side = <span> <span> <span> 82.0749

</span></span></span>


5 0
3 years ago
Need help with mean , median , mode question<br> + a few more..
Andreas93 [3]

Answer:

Mean:

a) 4

b) 2

c) 2

d) 2

Median:

a) 4,2

b) 5,2

c) 5,1

d) 4,1

Mode:

a) 1

b) 1

c) 1

d) 1

Step-by-step explanation:

Mean:

a) 1+4+2+1 = 8/4=4

b)1+5+2+1 = 9/4= 2.25 (round to the nearest whole number = 2)

c) 1+5+1+0 = 7/4 = 1.75 (round to the nearest whole number = 2)

d) 1+4+1+0 = 6/4 = 1.5 (round to the nearest whole number = 2)

3 0
3 years ago
Christine purchased a prepaid phone card for $20. Long distance calls cost 18 cents a minute using this card. Christine used her
Luda [366]

Answer:

4 minutes and 32 seconds

Step-by-step explanation:

card $20.00-money left over $15.68            $20.00-$15.68  4.32

6 0
3 years ago
HELP!!! I WILL MARK BRAINLEST!
agasfer [191]

Answer:

B: (16,32)

Step-by-step explanation:

Please give brainlest

4 0
3 years ago
Read 2 more answers
A boat travels 30 miles up the river in the same amount of time it takes to travel 38 miles down the same river. If the current
Ksenya-84 [330]
X miles per hour  -  <span> speed of the boat in still water
(x - 2)  -  speed up the river
(x + 2)  -  speed down the river
</span>
\frac{30}{x - 2} = \frac{38}{x + 2}
30 * (x + 2) = 38 * (x - 2)
30x + 60 = 38x - 76
- 8x = - 136
x = 17 miles per hour  -  <span>the speed of the boat in still water.</span>
5 0
3 years ago
Other questions:
  • If a number (blank), then the number is less than its absolute value
    13·1 answer
  • The expression 3 1/2x + 18 represents the perimeter of the rectangle shown. Write an expression that represents the length of th
    11·1 answer
  • The advertised claim for batteries for cell phones is set at 48 operating hours with proper charging procedures. A study of 5000
    14·1 answer
  • Factor: -12n-20 plz help me ;-;
    15·1 answer
  • Does anyone know how to do this? If so please add steps. Geometry M1 Lesson 8 exit ticket
    9·1 answer
  • The point T(-1, 4) is reflected over the line y = 3. What are the coordinates of the resulting point, T′?
    6·2 answers
  • Is the square root of 3 rational?
    5·1 answer
  • Please help asap I HV a time​
    12·1 answer
  • A sign made of solid wood is in the shape of a pyramid. The base is a triangle with a base of 6 feet and a height of 4 feet. The
    5·1 answer
  • HHelp please and thank you will mark brainliest
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!