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blsea [12.9K]
3 years ago
14

Which expression is equivalent to (3b + 2r) + (4b + r)?

Mathematics
2 answers:
marysya [2.9K]3 years ago
6 0
(3b+2r)+(4b+r)=3b+4b+2r+r=7b+3r. B. 7b+3r
lozanna [386]3 years ago
4 0
To do this problem, you need to first get rid of all the parenthesis. Since all the operations are addition (+), remember the <span>Associative Property of Addition. This property says when you're adding, it doesn't matter where you put the parentheses because it'll all add up to the same thing.

That means </span>(3b + 2r) + (4b + r) = (3b + 4b) + (2r + r), or even, just get rid of the paratheses in general and have (3b + 2r) + (4b + r) = (3b + 2r + 4b + r).

Either way, now you can add like terms so: 
(3b + 2r) + (4b + r) = (3b + 4b) + (2r + r) = 7b + 3r

Your answer is B) <span>7b + 3r</span>
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What is the equation of the line that goes through the points (- 2, 1) and (0, 4) ? (Write your answer in standard form .)
tekilochka [14]

Answer:

3x-2y+8=0

Step-by-step explanation:

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The slope of the line that goes through the points (x, y) and (0, 4) is

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2 years ago
A number cube with faces labeled from 1 to 6 will be rolled once.
tresset_1 [31]

Question:

A number cube with faces labeled from 1 to 6 will be rolled once.  The number rolled will be recorded as the outcome.

Give the sample space describing all possible outcomes.  Then give all of the outcomes for the event of rolling a number greater than 2.

If there is more than one element in the set, separate them with commas.

Answer:

S = \{1,2,3,4,5,6\}

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Step-by-step explanation:

Given

A roll of a 6 sided number cube

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This implies that we list out all number on the number cube.

So:

S = \{1,2,3,4,5,6\}

Solving (b): Outcomes greater than 2

This implies that we list out all number on the number cube greater than 2 i.e. 3 to 6.

So:

Greater2 = \{3,4,5,6\}

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artcher [175]
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