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3 years ago

Matt says he can find the sum of 45+50 without rewriting it. Explain how you can solve this problem using mental math.

Mathematics

2 answers:

ryzh [129]3 years ago

6 0

Thinking about combining 45 pennies and 50 pennies. How many pennies would you have in total? 95

brilliants [131]3 years ago

6 0

You could add 4+5 and then 5+0 and boom there's your answer!! Hope this helped

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Help please and simplify answer in radical form if needed

deff fn [24]

Answer:

$16\sqrt{3}\:\mathrm{units^2}$

Step-by-step explanation:

The area of an equilateral triangle with side length $s$ is equal to $\frac{\sqrt{3}}{4}s^2$ . Since the perimeter is 24 units and there are three equal sides to an equilateral triangle, each side is $24\div 3=8$ units.

Substituting in this value, we get:

$\frac{\sqrt{3}}{4}8^2=\frac{64\sqrt{3}}{4}=\boxed{16\sqrt{3}}$

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