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stira [4]
4 years ago
10

Use mental math to evaluate the expression 6(31)+6(4)-6(15)

Mathematics
1 answer:
vladimir1956 [14]4 years ago
6 0
The expression given is
6(31) + 6(4) - 6(15)
Now we already know the rule of BODMAS ( Bracket of division, multiplication, addition, substration).
So in the given equation we have to first multiply the numbers within the bracket with the number outside the bracket and then proceed to the next step.
So
188 + 24 - 90
Now we have to add first as per the rule of BODMAS. So the epression comes down to:
212 - 90
= 122
So the correct answer to the expression is 122.
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What is the equation of the points (-3,2) (2,-1) in standard form? 
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You can just plug in one of the points to each equation until you get an equality that is true.

I chose to use (-3,2)

1. 5x+3y=1
5(-3)+3(2)=1
(-15)+ 6 = 1
(-9) = 1 <<<(FALSE)

2. x+5y=3
(-3)+5(2)= 3
(-3)+10= 3
7=3 <<<(FALSE)

3. 3x+5y=1
3(-3) + 5(2)= 1
(-9)+10=1
1=1<<<(TRUE)

So, the correct equation is 3x+5y=1.

Make sense?
3 0
4 years ago
Brooke and Lamont ran a half marathon. Brooke finished in 1 hour 40
Paha777 [63]

Answer:

B. Brook finished in 100 minutes, so Lamont was faster.

Step-by-step explanation:

1 hour = 60 Minutes

60 minutes + 40 minutes = 100 Minutes.

If you run and you have more minutes then someone else that means you ran for a longer time and your a little bit slower?

Comment down below, Did I help? ^w^

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3 years ago
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Ber [7]
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Step-by-step explanation:

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