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2 years ago

Place the four steps of the elimination method in the proper order

Mathematics

1 answer:

Reptile [31]2 years ago

8 0

Find a variable with equal or opposite coefficients, if equal then subtract the equations but if opposite then add, solve one variable equation left, and then substitute known variable into other equation and solve

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Is 3(x + 1)2 = (3x + 3)2 an identity? Explain and show your reasoning.

Scilla [17]

Answer:

YES

Step-by-step explanation:

The equation, $3(x + 1)2 = (3x + 3)2$ , would be an identity if the equation remains true regardless of the value of x we choose to plug in into the equation.

Let's find out if we would always get a true statement using different value of x.

✍️Substituting x = 1 into the equation:

$3(x + 1)2 = (3x + 3)2$

$3(1 + 1)2 = (3(1) + 3)2$

$3(2)2 = (3 + 3)2$

$12 = 12$ (TRUE)

✍️Substituting x = 2 into the equation:

$3(x + 1)2 = (3x + 3)2$

$3(2 + 1)2 = (3(2) + 3)2$

$3(3)2 = (6 + 3)2$

$18 = 18$ (TRUE)

✍️Substituting x = 3 into the equation:

$3(x + 1)2 = (3x + 3)2$

$3(3 + 1)2 = (3(3) + 3)2$

$3(4)2 = (9 + 3)2$

$24 = 24$ (TRUE)

Therefore, we can conclude that the equation, $3(x + 1)2 = (3x + 3)2$ , is an identity.

8 0

3 years ago

Which of the following expressions are equivalent to x−(−x)+y

Sonbull [250]

Answer:

C. None of the above.

Step-by-step explanation:

x − (−x) + y

x + x + y

= 2x + y.

6 0

3 years ago

Read 2 more answers

Please help with all of these!!! VERY URGENT!!!

nlexa [21]

1. The coefficient is 5
2. The terms are 2x, 4y, and 8
3. The variables are c, cd, d and d
4. The constants are 2 and 14

5 0

3 years ago

Read 2 more answers

Jen pours out 6 ounces of water from a full bottle. She estimates that she poured out 20% of the water in the bottle. About how

faust18 [17]

Answer:

30 ounces i think

Step-by-step explanation:

20% times 5 = 100%

6 in every 20%

since there is 5 20%'s, multiply 6 times 5 and you get 30

7 0

2 years ago

0.00000003 in scientific notation

tester [92]

Answer:

3× $10x^{-8}$

Step-by-step explanation:

0.00000003

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

6 0

2 years ago