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3 years ago

Are these correct? If not what are the correct answers?

Mathematics

1 answer:

zaharov [31]3 years ago

5 0

Answer:

correct

Step-by-step explanation:

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A stock gained 2 7/8 points, lost 1 3/4 points, gained 1/2 points, lost 5 points. What was the total change in the stocks price?

LenaWriter [7]

Answer: So it's negative (If thats ok) 3 3/8

Step-by-step explanation:

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2 years ago

A teacher wrote this expression on the board (-6)(2)+(-8+4)

Ne4ueva [31]

Answer:

The answer is -16

Step-by-step explanation:

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3 years ago

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I have the same hundreds digit as ones digit. The value of my tens digit is 50. The value of my ones digit is 4. the number is.

Dmitriy789 [7]

The number is 454.

This is because since the ones digit is 4 and the hundreds digit is the same as the ones digit, the hundreds digit is 400.

400 + 50 + 4 = 454

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3 years ago

Can y’all answer both please .

Mamont248 [21]

Answer:for number 2 the answer is D for number 3 the answer is B

Step-by-step explanation:

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3 years ago

(x+3)(3x² - 5x - 10) multiply polynomial

brilliants [131]

Answer:

$\boxed{\sf{3x^3+4x^2-25x-30}}$

Step-by-step explanation:

$\underline{\text{SOLUTION:}}$

To isolate the term of x from one side of the equation, you must multiply by a polynomial.

$\underline{\text{GIVEN:}}$

$:\Longrightarrow: \sf{(x+3)(3x^2 - 5x - 10)}$

You have to solve with parentheses first.

$:\Longrightarrow \sf{x\cdot \:3x^2+x\left(-5x\right)+x\left(-10\right)+3\cdot \:3x^2+3\left(-5x\right)+3\left(-10\right)}$

Solve.

$\sf{x*3x=3x^3}$

x(-5x)=-5x²

$\sf{x(-10)=-10x}$

3*3x²=9x²

3(-5x)=-15x

3(-10)=-30

Then, rewrite the problem down.

$\sf{3x^3-5x^2-10x+9x^2-15x-30}$

Combine like terms.

$\Longrightarrow: \sf{3x^3-5x^2+9x^2-10x-15x-30}$

Add/subtract the numbers from left to right.

-5x²+9x²=4x²

$\Longrightarrow: \sf{3x^3+4x^2-10x-15x-30}$

Solve.

$\sf{-10x-15x=-25x}$

Then rewrite the problem.

$\Longrightarrow: \boxed{\sf{3x^3+4x^2-25x-30}}$

Therefore, the correct answer is 3x³+4x²-25x-30.

I hope this helps! Let me know if you have any questions.

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2 years ago

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