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3 years ago

Simplify 2(3x-1)+5.

Mathematics

1 answer:

wlad13 [49]3 years ago

4 0

Answer:

Step-by-step explanation:

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3 years ago

What is the answer to 7(8a + 7)

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3 years ago

Read 2 more answers

What is a simplified eCarlotta thinks that 3y + 5y3 is the same as 8y4. Which statement shows that it is NOT the same?Xpression

stira [4]

Questions:

(a) What is a simplified expression for (x + y) – (x – y)?

(b) Carlotta thinks that $3y + 5y^3$ is the same as $8y^4$ . Which statement shows that it is NOT the same?

Answer:

$(x + y) - (x - y) =2y$

$3y + 5y^3 \ne 8y^4$

Step-by-step explanation:

Solving (a):

Given

$(x + y) - (x - y)$

Required

Simplify

$(x + y) - (x - y)$

Open brackets

$(x + y) - (x - y) = x + y - x + y$

Collect Like Terms

$(x + y) - (x - y) = x - x+ y + y$

$(x + y) - (x - y) = y + y$

$(x + y) - (x - y) =2y$

Solving (b):

Given

$3y + 5y^3$ and $8y^4$

Required

Which expression shows they are not the same

The expression that shows this is:

$3y + 5y^3 \ne 8y^4$

Take for instance; y=2

Substitute 2 for y in $3y + 5y^3 \ne 8y^4$

$3*2 + 5*2^3 \ne 8*2^4$

Evaluate all exponents

$9 + 5*8 \ne 8*16$

$9 + 40 \ne 128$

$49 \ne 128$

The above expression supports $3y + 5y^3 \ne 8y^4$

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3 years ago

I need help on this please

Misha Larkins [42]

Answer:

B. R/3

Step-by-step explanation:

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3 years ago

Solve for x 3x^2+18x+27=0 please help I am doing a unit exam on Khan academy and I need a A

Sphinxa [80]

Answer:

X=3

Step-by-step explanation:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

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4 years ago