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2 years ago

1. Jamar writes 5 -(-6). 4+(-3) = 41. Elena says the result should be

Mathematics

1 answer:

densk [106]2 years ago

4 0

Answer:

Elena is correct

Step-by-step explanation:

5 - (-6) * 4 + (-3)

5 - (-24) + (-3)

5 + 24 - 3

29 - 3 = 26

Start by multiplying (-6) * 4

Then rewrite your equation into 5 - (-24) + (-3)

A negative minus a negative equals a positive so you rewrite your equation to 5 + 24 - 3

Subtract 29 - 3 and you get 26 so therefor Elena is correct

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Answer:

12 coins

Step-by-step explanation:

Points scored by collecting 7 coins = 581

Number of coins required to collect 996 points

Let Number of coins = c

7 coins = 581 points

c coins = 996 points

Cross multiply :

581 * c = 996 * 7

581c = 6972

Divide both sides by 581

581c / 581 = 6972 / 581

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Hence, number of coins required to collect 996 points is 12

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Simplify. <br><br> −3x3(−2x2+4x−3)

stepladder [879]

Answer:

$-3x^3(-2x^2+4x-3)$ simplifies to $6x^5-12x^4+9x^3$

Step-by-step explanation:

Given expression $-3x^3(-2x^2+4x-3)$

We have to simplify the above expression,

Consider the given expression $-3x^3(-2x^2+4x-3)$

Multiply each term in brackets by $-3x^3$ , we get,

$-3x^3(-2x^2+4x-3)=-3x^3(-2x^2)-3x^3(4x)[-3x^3(-3)$

Solving further, using $x^n\cdot x^m=x^{n+m}$ we get,

$-3x^3(-2x^2)-3x^3(4x)[-3x^3(-3)=6x^5-12x^4+9x^3$

Thus, $-3x^3(-2x^2+4x-3)$ simplifies to $6x^5-12x^4+9x^3$

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