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
kozerog [31]
3 years ago
6

Could someone pls send me an example of using the substitution method in algebra?

Mathematics
1 answer:
Elden [556K]3 years ago
8 0

Answer:

in this method a variable is expressed in terms of another variable from one equation and it is substituted in remaining equation.

Step-by-step explanation:

solve:x+2y=9 and 3x-y=13.

x+ 2y=9…be the first equation

3x-y=13…be the second equation

from first equation

x=9-2y…be the third equation substituting value of x from third equation in second equation, we get

3(9-2y)-y=13

or, 27-6y-y=13

or, y=2

now,

substituting value of y in third equation, we get,

x=9-2×2

=9-4

=5

the required value of x and y are 5&2

You might be interested in
Which is the best estimate for the percent equivalent to 3/8​
Doss [256]

Answer:

D. 38%

Step-by-step explanation:

3/8 as a percentage is 37.5% and that is rounded to 38%! :) 37% is close but it is not rounded making it not the best estimate, therefore it is not correct.

8 0
3 years ago
A cube has a length, width and height of 6 feet. What is the volume in cubic INCHES?
rodikova [14]

Volume of cube = ( side)^3

Side = 6 feet = 6×12 = 72 inches ( 1ft =12 inch)

Vol. = (72)^3 = 72×72×72= 373248 cubic inches

6 0
3 years ago
12 times what equals 360?
creativ13 [48]
The answer is 30. 360/12.
3 0
3 years ago
Read 2 more answers
Rob owes Debra $36 and pays her 1/3 of what he owes. How much does he now owe?
wolverine [178]

Answer:

24

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
​Recently, a random sample of 13-18 year olds was​ asked, "How much do you currently have in​ savings?" The data in the table re
Sonbull [250]

Answer:

μ = 235.38

σ = 234.54

Step-by-step explanation:

Assuming the table is as follows:

\left[\begin{array}{cc}Savings&Frequency\\\$0-\$199&339\\\$200-\$399&86\\\$400-\$599&55\\\$600-\$799&18\\\$800-\$999&11\\\$1000-\$1199&8\\\$1200-\$1399&3\end{array}\right]

This is an example of grouped data, where a range of values is given rather than a single data point.  First, find the total frequency.

n = 339 + 86 + 55 + 18 + 11 + 8 + 3

n = 520

The mean is the expected value using the midpoints of each range.

μ = (339×100 + 86×300 + 55×500 + 18×700 + 11×900 + 8×1100 + 3×1300) / 520

μ = 122400 / 520

μ = 235.38

The variance is:

σ² = [(339×100² + 86×300² + 55×500² + 18×700² + 11×900² + 8×1100² + 3×1300²) − (520×235.38²)] / (520 − 1)

σ² = 55009.7

The standard deviation is:

σ = 234.54

6 0
3 years ago
Other questions:
  • If the temperature of gas increases , the volume of that gas __________.
    14·2 answers
  • The length of the shorter base in an isosceles trapezoid is 4 in, its altitude is 5 in, and the measure of one of its obtuse ang
    6·1 answer
  • Plz help me well mark brainliest if correct....................................................!??????pppppppppppppppppppppppppp
    15·1 answer
  • Select the correct answer.
    11·2 answers
  • 3. Angle g and angle h are:
    10·2 answers
  • Write an inequality A family has less than $200 to spend on groceries. Use x as a variable​
    5·1 answer
  • The front and back sides are both triangles, explain why you arent going to divide the base x height by 2.
    11·2 answers
  • Select the three ratios that represent the number of blue marbles to red marbles.
    12·1 answer
  • 3. Look at the map. Explain why Elm Street and Birch Street are not perpendicular.
    14·1 answer
  • What is the image of the point (0,5)(0,5) after a rotation of 180^{\circ}180
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!