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
Pani-rosa [81]
3 years ago
5

How can you use substitution method to solve a system of equations that does not have a variable with a coefficient of 1 or –1?

Mathematics
1 answer:
kap26 [50]3 years ago
6 0
You can multiply or divide one equation so that it has a variable with a coefficient opposite of the other equation.
Example:
A) 2x + 3y = 6
B) 4x +2y = 20
Notice that neither equation has a "1" or "-1"
Let's multiply Equation A) by -2
A) -4x -6y = -12 Then add it to B)
B) 4x +2y = 20
-4y = 8
y= -2

A) 2x + 3*-2 = 6
2x = 12
x = 6



You might be interested in
(6,-5) is a point on the terminal side of 0. Find the exact values of cos0, csc0, and tan0.
Dmitrij [34]

point (6, -5) => x = 6, y = -5

r =√6² +(-5)² = √(36+25)=√61

the exact value of :

cos 0 = x/r = 6/√61 = 6/61 √61

csc 0 = r/y = √61/(-5) = -1/5 √61

tan 0 = y/x = -5/6

4 0
3 years ago
Read 2 more answers
X² - 2ax + b = 0<br>solve using completing the square​
prisoha [69]
Use the formula
(b/2)*2
in order to create a new term. Solve for
by using this term to complete the square.
Cannot solve by completing the square.
5 0
3 years ago
Read 2 more answers
Find percent of change. $210 to $35
Tom [10]

Answer:

83%

Step-by-step explanation:

you take 210 - 35 over 210 which is 170 over 210 divide and you get rounded about .83 that as a percent is 83%

7 0
4 years ago
Smoothing a time series of observations A. is a form of statistical cheating. B. allows statisticians to use less data than woul
DedPeter [7]

Answer:

D. is used to reveal an underlying pattern in the data.

Step-by-step explanation:

Smoothing a time series is achieved when a computer uses some pre-programmed calculation methods to remove noise from large volumes of data. Smoothing helps a user detect patterns in a set of data, thus making it possible to make future predictions. For example, smoothing can be used in the prediction of the rise and fall of stock prices. This helps the traders to have an idea of what to expect in the cost of trading.

Although smoothing reveals the patterns in a set of data, it provides no explanation as to why it is so. It is left to the researcher to draw conclusions as to the reasons for the patterns.

5 0
4 years ago
An ostrich can run 174 feet in 3 seconds.
bonufazy [111]

Answer:

58 I think i'm wrong tho

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • A parking garage charges an initial fee of $7.00 for up to 2 hours of parking, and an hourly rate for each additional hour
    8·1 answer
  • Need a helping hand here
    8·1 answer
  • 7. You have invested $2500 in a 30-day savings certificate paying 4.15% per annum. Find the
    12·1 answer
  • Describe a relationship modeled by the function f(x) = 4x3 − 72x2 + 320x
    7·1 answer
  • Find the value of g(x)=2-x^2 and f(x)=2x-1 , a, g(-8)
    12·2 answers
  • a bus travels 320 miles in 6.4 hours. if the bus continues at the same rate, which proportion can be used to find m, the number
    8·1 answer
  • selects a piece of candy and eats it (so it is NOT replaced!) Then selects a piece of candy and eats it. Find the probability of
    8·1 answer
  • Factorize (x-3y)^3+27y^3<br> With explanation <br> Will mark Brainliest for the best one...
    14·1 answer
  • A cube numbered 1-6 is rolled once. What is the probability that the side facing up shows 4?
    5·1 answer
  • Find the perimeter<br> simply Answer
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!