3 years ago

How could you rewrite the expression (3+5)+8 using the associative property of addition

Mathematics

2 answers:

IRINA_888 [86]3 years ago

8 0

It would be 8+8

You have to add what is in the parentheses and that should give you the equation!

mezya [45]3 years ago

4 0

Answer:

16 :)

Step-by-step explanation:

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Joel is making a scarf. The diagram shows the ratio of knit stitches and purl stitches of Joel's scarf. A tape diagram showing 2

r-ruslan [8.4K]

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4 years ago

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Plz plz help me look at the image

Dominik [7]

Answer:

Step-by-step explanation:

$2(x + 4) = 28$

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3 years ago

On a particular day, the wind added 5 miles per hour to Alfonso's rate when he was cycling with the wind and subtracted 5 miles

Nata [24]

now, this is pretty much the same as the one before it with Jaime, so I'll do this without much fuss.

recall d = rt.

a = Alfonso's rate

with the wind his speed is a + 5, against it is a - 5, 60 miles with it and 30 miles against it, all in the same time of t hours.

$\bf \begin{array}{lcccl} &\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\ &------&------&------\\ \textit{with the wind}&60&a+5&t\\ \textit{against the wind}&30&a-4&t \end{array} \\\\\\ \begin{cases} 60=(a+5)t\implies \frac{60}{a+5}=\boxed{t}\\\\ 30=(a-4)t\\ -------------\\ 30=(a-4)\left( \boxed{\frac{60}{a+5}} \right) \end{cases} \\\\\\ 30(a+5)=(a-4)60\implies 30a+150=60a-240 \\\\\\ 390=30a\implies \cfrac{390}{30}=a\implies 13=a$