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3 years ago

What is the first step in evaluating the expression 3x[9-(4+2)/2

Mathematics

2 answers:

harina [27]3 years ago

7 0

Answer:

4+2

Step-by-step explanation:

PEMDAS

P for parentheses

yuradex [85]3 years ago

5 0

Answer:

3 × [9 - (4 + 2) ÷ 2]

Solution steps as below:

⇒ 4 + 2 = 6
⇒ 6 ÷ 2 = 3
⇒ 9 - 3 = 6
⇒ 3 × 6 = 18

Correct choice is:

Adding 4 and 2

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Solve for x using the distributive property. 3(-3 - 3x) = 27

xeze [42]

Answer:

-9-9x=27+9

-9x=36÷(-9)

x=-4

Step-by-step explanation:

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3 years ago

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PLEASE HELP ME OUT IM FAILING. Thx

BARSIC [14]

Answer: x∈(5,∞)

Step-by-step explanation:

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3 years ago

A space shuttle orbits Earth one time in 90 minutes how many times does it orbit around Earth in 6 hours

amid [387]

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4 years ago

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Virty [35]

Option C

When $(2x - 3)^2$ is subtracted from $5x^2$ then the result is $x^2 + 12x - 9$

<h3>Solution:</h3>

Given that $(2x - 3)^2$ is subtracted from $5x^2$

We have to find the result

Subtraction is a mathematical operation that tells us the difference between two numbers.

When "a" is subtracted from "b", we write in mathematical expression as "b - a"

So $(2x - 3)^2$ is subtracted from $5x^2$ is written mathematically as:

$\rightarrow 5x^2 - (2x - 3)^2$

Expanding the above expression using algebraic identity:

$(a-b)^2 = a^2 - 2ab + b^2$

$\rightarrow 5x^2 - ((2x)^2 -2(2x)(3) + (3)^2)\\\\\rightarrow 5x^2 - (4x^2 - 12x + 9)$

Multiplying the nnegative sign with terms inside bracket

There are two simple rules to remember:

When you multiply a negative number by a positive number then the product is always negative.

When you multiply two negative numbers or two positive numbers then the product is always positive.

$\rightarrow 5x^2 - (4x^2 - 12x + 9)\\\\\rightarrow 5x^2 - 4x^2 + 12x -9\\\\\rightarrow x^2 + 12x - 9$

Hence the result is: $x^2 + 12x - 9$

3 0

3 years ago

25 points

lbvjy [14]

Answer:

unit_4_study_guide_solutions.pdf

Step-by-step explanation:

This link is a study guide, and on the LAST PAGE it has the answer to your question!

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3 years ago