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4 years ago

What is the surface area?

Mathematics

1 answer:

bezimeni [28]4 years ago

7 0

Step-by-step explanation:

The formula for the surface area of a pyramid is:

$SA=B+\frac{1}{2}l(numberofbasesides)(b)$

B will be the area of the base, which is the triangle. After we figure out the value of B we can plug everything we know into the equation.

The formula for the area of a triangle is:

$A=\frac{1}{2}bh$

$A=.5*2*1.7$

A = 1.7

Now that we have the value of B, we can plug it into the formula along with the other things from the picture we know.

$SA=1.7+.5*2*3*2$

$SA=$

10.2 ft^2

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Given the points (-2, 0), (-1,0), (0, – 8), (2, 0), write the polynomial in factored form.

Ket [755]

As per given by the question,

There are given that four point.

The point is,

$(-2,\text{ 0), (-1, 0), (0, -8), (2, 0)}$

Now,

From given point,

$(-2,\text{ 0), (-1, 0), (0, -8), (2, 0)}$

Then, the factor is,

$(x+2)(x+1)(x-2)$

Now, solve the above equation,

$(x+2)(x+1)(x-2)$

The factorial formd will be,

$y=a\times(x+2)\times(x+1)\times(x-2)$

Now, find the value of "a" with the help of given point (0, -8).

So,

Puth the value of x =0, and y=-8 in above equation,

Then,

$\begin{gathered} y=a\times(x+2)\times(x+1)\times(x-2) \\ -8=a\times(0+2)\times(0+1)\times(0-2) \\ -8=a(2)(1)(-2) \\ a=\frac{-8}{-4} \end{gathered}$

Then, a=2.

Now,

The value of a is 2.

And,

The polynomial in the factored form is,

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1 year ago

What is the value of x and y

swat32

Step-by-step explanation:

(25x+8)°+(9x+2)°=180--->(1)(sum of angles on a straight line

(7y+5)°=(9x+2)°------------->(2)(vertical angles)

25x°+8°+9x°+2°=180°

34x°=170°

x=5°

from equation (2) substitute for x=5°

7y°+5°=9x°+2°

7y°+5°=9(5)°+2°

7y°=47°-5°

7y°=42°

y=6°

(x, y)=(5°,6°)

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3 years ago

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