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djyliett [7]
1 year ago
10

Hi! So, I know I got this answer wrong, but I wasn't sure how to solve an equation with signs like: [brackets] in it, I've inclu

ded my problem as an example, but can someone please teach me what those brackets mean, and how do I go about solving an equation (using this problem as an example) with brackets like these?

Mathematics
1 answer:
dimaraw [331]1 year ago
8 0

Step-by-step explanation:

Brackets is the bigger version of parentheses, you first solve the questions inside the parentheses, then move onto brackets.

For example, this question:

x=-1\\y=-2\\z=3

5x-y[7-4(z-y)]

<u>plug in x, y, and z.</u>

5(-1)-(-2)[7-4(3-(-2))]
5(-1)-(-2)[7-4(5)]

5(-1)-(-2)[7-20]

5(-1)-(-2)[-13]

-5-(-2)[-13]

-5-26

-31

I hope you understand better now.

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Answer:

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2 years ago
How do I solve 4(5(6))<br><br> This is a hypothetical question
SSSSS [86.1K]
PEMDAS states that the value in the parenthesis should be evaluated first:
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6 0
3 years ago
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At a clothing store, jackets are on sale for 30% off. Sales tax is 5%. Which expression will calculate the total cost of a jacke
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Answer: B.x(0.75)

Step-by-step explanation:

If the jacket has a cost of x, but has 30\% off and we have to add the 5\% in tax, we can write all in the following expression:

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Where:

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This can be also rewritten as:

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3 0
3 years ago
A type is typically makes an error on one out of every 21 documents they complete if the typist can complete 120 documents an ho
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A set X consists of all real numbers greater than or equal to 1. Use set-builder notation to define X.
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For example, { x | x > 0 }  is equivalent to “the set of all x such that x is greater than 0”.

 

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In the problem, there are 2 conditions that must be satisfied:

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In the notation, this is written as “x ε R”. Where ε means that x is “a member of” and R means “Real number”

 

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Answer:

Combining the 2 conditions into the set-builder notation:

<span>X = { x | x ε R and x ≥ 1 } </span>
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