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
Bad White [126]
3 years ago
9

How to substitution math work

Mathematics
1 answer:
vova2212 [387]3 years ago
5 0
Well lets just we have

2x-3y=-2
4x+y=24
Well first we see we have "Y'" by itself which is great that means we can use substitution. So now we just set "Y"by itself. So subtract 4x on both sides and we get

y = -4x+24 now we just plug "Y" into the first equation
2x-3(-4x+24)=-2
Distribute the 3 and simplify and we get x=5

Plug (5) back into either top or bottom equations
4(5)+y=24
20+y=24
y=4
You might be interested in
How old would I be if I was born in 1921
earnstyle [38]
2016 - 1921 = 95
Hope this helped!
6 0
3 years ago
-3/5x - 7/20x + 1/4x= -56
romanna [79]

Answer:

x = 80

Step-by-step explanation:

Combine − 3/5x and 7/20x to get -19/20x.

Then combine -19/20x and 1/4x and you get -7/10x.

Then you multiply both sides by -10/7 which is the reciprocal of -7/10.

Make -56(-10) one fraction.

Multiply -56 and -10 and you get 560.

Then divide 560 by 7 to get 80.

 

​  

8 0
3 years ago
Read 2 more answers
multiplication is defined as repeated addition.use the word repeated to define exponential form.justify your reasoning.
mash [69]
Exponential form is when a certain number is raised to the power of a certain number or also known as exponents. Exponents signifies that the base or the number that is being raised to a certain powers will be multiplied a number of times, based on the exponents).

Exponential form is defined as repeated multiplication of  the base.
4 0
3 years ago
In the figure, parallel lines r and s are cut by line t
Lady_Fox [76]

Answer:

<u>x = 49</u>

Step-by-step explanation:

Since the line is parallel, the value of 2x - 8 is equal to 90.

=> 2x - 8 = 90

=> 2x = 98

=> <u>x = 49</u>

7 0
2 years ago
Read 2 more answers
Use technology and the given confidence level and sample data to find the confidence interval for the population mean mu . assum
attashe74 [19]

To solve for the confidence interval for the population mean mu, we can use the formula:

Confidence interval = x ± z * s / sqrt (n)

where x is the sample mean, s is the standard deviation, and n is the sample size

 

At 95% confidence level, the value of z is equivalent to:

z = 1.96

 

Therefore substituting the given values into the equation:

Confidence interval = 3 ± 1.96 * 5.8 / sqrt (51)

Confidence interval = 3 ± 1.59

Confidence interval = 1.41, 4.59

 

Therefore the population mean mu has an approximate range or confidence interval from 1.41 kg to 4.59 kg.

6 0
3 years ago
Other questions:
  • Please help i don't understand
    13·1 answer
  • Fourteen boys and 21 girls will be equally divided into groups . find the greatest number of groups that can be created if no on
    14·1 answer
  • Anyone please .help me to solve this​
    10·2 answers
  • Mike needs $1551 each month for bills
    8·1 answer
  • One third of your class of 18 students likes vanilla frozen yogurt. How many students in
    12·2 answers
  • A store sells 22 bottles of water for $4. Use the ratio table to find the cost of 33 bottles.
    10·1 answer
  • You sell small and large candles at a craft fair. You collect $144 selling a total of 28 candles. How many of each type of candl
    6·1 answer
  • Pls answer!! I’ll mark you brainlist if it’s correct!
    14·1 answer
  • What is the measure of
    13·1 answer
  • Before a renovation, a movie theater had 134 seats. After the renovation, the theater has 188 seats. What is the approximate per
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!