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4 years ago

Help please !!!! my brain hurts

Mathematics

1 answer:

fiasKO [112]4 years ago

8 0

Answer:

the answer id d.

Step-by-step explanation:

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How would you solve this problem step by step ?<br><br> 4√15(2√2 + √5)

xxTIMURxx [149]

$~~4\sqrt{15} \left( 2\sqrt 2 + \sqrt 5 \right)\\\\=8\sqrt{15} \sqrt 2 + 4\sqrt{15} \sqrt 5\\\\=8\sqrt{15\times 2}+4 \sqrt{15 \times 5}\\\\=8\sqrt{30}+4\sqrt{3 \times 5 \times 5}\\\\=8\sqrt{30} + 4 \sqrt{3\times 5^2}\\\\=8\sqrt{30} + 4\cdot 5 \sqrt 3\\\\=8\sqrt{30} +20\sqrt{3}$

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2 years ago

Why can you eliminate the solution of -0.2 in the context of this problem? Check all that apply.

ivolga24 [154]

Answer: B (It does not make sense for time to be negative.) & C (The ball cannot hit the ground before it is thrown.)

Step-by-step explanation:

I answered the question already

7 0

3 years ago

8.4.49 A cow is tethered to one corner of a square barn, 19 feet by 19 feet, with a rope 160 feet long. (See the illustration

SashulF [63]

Answer:

$20096 ft^2$

Step-by-step explanation:

We are given that

Length of rope=l=160 feet

Radius of quadrant of circle=r=160 feet

We have to find the maximum grazing area of the cow.

We know that

Area of quadrant of circle= $\frac{1}{4}\pi r^2$

Where $\pi=3.14$

Using the formula

Area grazed by cow= $\frac{1}{4}\times 3.14(160)^2$

Area grazed by cow= $20096 ft^2$

4 0

4 years ago

Round 119.63 to the nearest whole number

Lisa [10]

When rounding to the nearest whole number from 119.63 you need to round the number up as the tenths column is above 5 meaning that the answer is 120 :)

8 0

4 years ago

Increase the product of w and 8 by 15

Ne4ueva [31]

Increase means add product means multiply

Wx8+15 it should be something along the lines of this

3 0

3 years ago

Help please !!!! my brain hurts ​

Help please !!!! my brain hurts