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lord [1]
3 years ago
10

Describe two methods for adding and subtracting linear expressions

Mathematics
1 answer:
otez555 [7]3 years ago
8 0
Three main methods come to mind: Substitution method, Elimination method, Matrix row-reduction.The first two methods are taught in early grades in most high schools. Matrix row-reduction is taught in senior years in high school, or more likely, in the early years of a university math or science program. 
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20+8y-9y-21 which expression is equivalent
faust18 [17]
Since you didn't provide expression to see which one is equivalent,, I will simply solve the expression you provided. If you need help finding out which expression option is equivalent after I solve this for you,, let me know and I would be more than happy to help you figure it out.
The first step for solving this expression is to calculate the difference between 20 and 21. We can start solving this by keeping the sign of the number with the larger absolute value and subtract the smaller absolute value from it. This will look like the following:
-(21 - 20)
Now subtract the numbers and add it back into the expression.
-1 + 8y - 9y
Next we need to collect the like terms with a y variable by subtracting their coefficients.
(8 - 9)y
Calculate the difference in the parenthesis.
-1y
Remember that when the term has a coefficient of -1,, the number doesn't have to be written but the sign must remain. 
-y
Lastly,, add this back into the expression to get your final answer.
-1 - y
Let me know if you have any further questions.
:)
4 0
3 years ago
Please help i’ll give u a brainliest
lubasha [3.4K]

Answer:

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2nd cylinder

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7 0
3 years ago
Solve the inequality 47.75 + x < 50 to determine how much more weight can be added to Li's suitcase without going
ehidna [41]

Answer:

Answer Choice A

Step-by-step explanation:

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8 0
3 years ago
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What is the inverse of f(x) = (5x+2)^2 for x > -2/5
Levart [38]

Answer:

it should be -2/5 or \frac{\sqrt{x} }{5}

Step-by-step explanation:

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Answer: B) 2(x + 3) - 1

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3 years ago
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