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3 years ago

I need help on adding and subtracting integers

Mathematics

2 answers:

VikaD [51]3 years ago

5 0

Answer:

Step-by-step explanation:

some examples

-5 + 9 = ?

you take the sign of the bigger number. so positive

and subtract them

9-5=4

-5 + 9 = 4

-30 + 5 = ?

the bigger number is a negative, now subtract

30-5 = 25

-30 + 5 = -25

-3 - 6 = ?

when both. signs are negative you add them, and keep the negative. sign

- 3 - 6 = - 9

-3 - (- 6) = ?

a negative beside a negative turns positive

-3 + 6 = 3

kodGreya [7K]3 years ago

3 0

Is there a specific problem you need help with?

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3 years ago

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

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4 years ago

Simplify the following algebraic expression. 3/4(1/2x-12)+4/5

Nana76 [90]

Answer:

Step-by-step explanation:

(3/8)x - 9 + 4/5

40(3/8x - 9 + 4/5)

15x - 360 + 32

15x - 328

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4 years ago

Read 2 more answers

So the question is "5(3x -5)" how do I know if the answer is 15x-25 or 15x+25?

nevsk [136]

Distribute.

5(3x - 5)
5*3x - 5*5
15x - 25

4 0

3 years ago

Read 2 more answers