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4 years ago

PLEASE HELP ME . Find the surface area of the triangular pyramid. *

Mathematics

2 answers:

kramer4 years ago

3 0

Answer:

89.4 yd

Step-by-step explanation:

Surface area of a triangular pyramid = B × H ÷ 2

6 × 5.2 ÷ 2 = 15.6

6 × 8.2 ÷ 2 = 24.6

15.6 + 24.6 + 24.6 + 24.6 = 89.4

choli [55]4 years ago

3 0

I really don’t know this question

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There are two boxes containing only black and orange pens.

cestrela7 [59]

Answer:

Event 3 -> Event 1 -> Event 4 -> Event 2

Step-by-step explanation:

The probability of choosing a certain pen is the number of that pen in the box over the total number of pens in the box.

So we have that:

Event 1: We have 4 black pen and 20 total pens, so P = 4 / 20 = 1 / 5

Event 2: All pens are black or orange so the probability is 1.

Event 3: We don't have white pens, so the probability is 0.

Event 4: We have 2 black pen and 5 total pens, so P = 2 / 5

Listing from least likely to most likely, we have:

Event 3 -> Event 1 -> Event 4 -> Event 2

3 0

3 years ago

How do you solve this absolute value equatuon? 4|x - 1| - 7 = -3

MatroZZZ [7]

4|x - 1| - 7 = -3 |add 7 to both sides

4|x - 1| = 4 |divide both sides by 4

|x - 1| = 1 ⇔ x - 1 = 1 or x - 1 = -1 |add 1 to both sides

x = 2 or x = 0

Answer: B.

3 0

4 years ago

What is the volume of this cube?<br><br>A. 4<br>B.3<br>C.6<br>D.1

EastWind [94]

Step-by-step explanation:

Length of cube (L) = 1 ft

Volume of the cube

= L³

= 1³

= 1 ft³

Hope it will help :)❤

4 0

3 years ago

Read 2 more answers

D.sqrt(2+x^/2)<br> Solve this question please

lidiya [134]

Answer:

Option a.

Step-by-step explanation:

By looking at the options, we can assume that the function y(x) is something like:

$y = \sqrt{4 + a*x^2}$

$y' = (1/2)*\frac{1}{\sqrt{4 + a*x^2} }*(2*a*x) = \frac{a*x}{\sqrt{4 + a*x^2} }$

such that, y(0) = √4 = 2, as expected.

Now, we want to have:

$y' = \frac{x*y}{2 + x^2}$

replacing y' and y we get:

$\frac{a*x}{\sqrt{4 + a*x^2} } = \frac{x*\sqrt{4 + a*x^2} }{2 + x^2}$

Now we can try to solve this for "a".

$\frac{a*x}{\sqrt{4 + a*x^2} } = \frac{x*\sqrt{4 + a*x^2} }{2 + x^2}$

If we multiply both sides by y(x), we get:

$\frac{a*x}{\sqrt{4 + a*x^2} }*\sqrt{4 + a*x^2} = \frac{x*\sqrt{4 + a*x^2} }{2 + x^2}*\sqrt{4 + a*x^2}$

$a*x = \frac{x*(4 + a*x^2)}{2 + x^2}$

We can remove the x factor in both numerators if we divide both sides by x, so we get:

$a = \frac{4 + a*x^2}{2 + x^2}$

Now we just need to isolate "a"

$a*(2 + x^2) = 4 + a*x^2$

$2*a + a*x^2 = 4 + a*x^2$

Now we can subtract a*x^2 in both sides to get:

$2*a = 4\\a = 4/2 = 2$

Then the solution is:

$y = \sqrt{4 + 2*x^2}$

The correct option is option a.

7 0

3 years ago

Find the value of y. images attached.

telo118 [61]

Answer:

<h3>The answer is option D</h3>

Step-by-step explanation:

Since it's a right angled triangle we can use trigonometric ratios to find the value of y

To find the value of y we use tan

$\tan(28) = \frac{y}{35} \\ y = 35 \tan(28) \\ y = 18.6098301...$

We have the final answer as

Hope this is helps you

5 0

3 years ago