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3 years ago

Donte used mental math to find the exact sum of 386 and 14. Which strategy could Donte have used?

Mathematics

2 answers:

prohojiy [21]3 years ago

7 0

Answer:

380 + 6 + 14

Step-by-step explanation:

Nostrana [21]3 years ago

3 0

Answer:

380 + 6 + 14

Step-by-step explanation:

The sum of 386 and 14 is 386 + 14 = 400.

To find which stategy he used, we find the results of each sum, and it has to be 400.

380 + 6 + 14

380 + 6 + 14 = 386 + 14 = 400

So this is the strategy that he could have used.

380 + 14 + 14

380 + 14 + 14 = 394 + 14 = 408

Result different of 400, which means that this was not the strategy

386 + 10 + 4 + 14

386 + 10 + 4 + 14 = 386 + 14 + 14 = 408

Result different of 400, which means that this was not the strategy

386 + 14 + 80 + 6

386 + 14 + 80 + 6 = 400 + 86 = 486

Result different of 400, which means that this was not the strategy

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disa [49]

Answer:

r = 18m

Step-by-step explanation:

h = 50 m

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a certain colony of bacteria doubles in size every 5 minutes if the colony began with two organisms how many will there be after

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Answer:

There will be 128 organisms after 30 minutes.

Step-by-step explanation:

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3 years ago

Which term describes a fraction that has a variable or variable expression in its numerator, its denominator, or both?. . A.Vari

yaroslaw [1]

The correct answer is A. rational expression

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4 years ago

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What value, written as a decimal, should Lena use as the common ratio? Lena is asked to write an explicit formula for the graphe

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Answer:

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Step-by-step explanation:

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A baseball team won 22 of the first 40 games it played. If the team's wins and losses continue at the same rate, how many games

Triss [41]

This game isn't too bad.
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Basically the problem states that the ratio:
22/40 is applicable to the ratio of:
# Wins / # Games

I'll represent the # Wins with the letter W.
and I'll represent the # of Games with the letter G.

So we simply set them equal to each other.

22/44 = W / G

They gave us G = 162 games

22 / 44 = W / 162

Cross multiply. So, the denominator on the left side of the equation will multiply with the numerator on the right. While the denominator on the right multiplies with the numerator on the left.

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You'll probably need a calculator for 22*162, but you can use long multiplication if it isn't allowed.

44W = 3564

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