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2 years ago

Please can someone find 8,9, and 10 please

Mathematics

1 answer:

asambeis [7]2 years ago

5 0

Answer:

8) 4

9) 16 $\pi$ OR 50.26548

10) 109.73452

Step-by-step explanation:

8) 8 ÷ 2 = 4

9) $\pi$ × 4² = 16 $\pi$ OR 50.26548

10) 8 × 20 = 160

160 - 50.26548 = 109.73452

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3 years ago

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2 years ago

In triangle ABC, AC=13, BC=84, and AB=85. Find the measure of angle C

r-ruslan [8.4K]

Answer:

90°

Step-by-step explanation:

Angle C = arccos((84²+13²-85²)/(2×84×13))

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Answered by GAUTHMATH

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2 years ago

Simplify

melomori [17]

Answer: $4\sqrt{3}$

Step-by-step explanation:

For this exercise it is important to remember the following:

$i=\sqrt{-1} \\\\i^2=-1$

Given the following expression:

$-2i\sqrt{-12}$

You can notice that the radicand (the number inside the square root) is negative. Therefore, in order to simplify the expression, you need to follow these steps:

1. Replace $\sqrt{-1}$ with $i$ and simplify:

$(-2i)(i)\sqrt{12}=-2i^2\sqrt{12}=-2(-1)\sqrt{12}=2\sqrt{12}$

2. Descompose 12 into its prime factors:

$12=2*2*3=2^2*3$

3. Substitute into the expression:

$=2\sqrt{2^2*3}$

4. Since $\sqrt[n]{a^n}=a$ , you can simplify it:

$=(2)(2)\sqrt{3}=4\sqrt{3}$

4 0

3 years ago

Please answer this correctly

Andrej [43]

I believe the answer is 120. 3 5/6 turns into 3.833 when turned into a decimal. 3.833 would round up to 4 which is the nearest whole number. 34 3/7 would turn into 34.4285 as a decimal which turns into 30 when rounded to the nearest ten.

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3 years ago