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denis23 [38]
3 years ago
5

What do -2(3x-10y+8) equals

Mathematics
2 answers:
lesantik [10]3 years ago
6 0

Answer:

= - 6 x + 20 y - 16

Step-by-step explanation:

step one . multiply the parenthesis by -2

step two . multiply whats left

step three . DONE

Hope this helped. I'd love for you to mark brainliest if you dont mind ❤️ Let me know if you need anything else.

Nastasia [14]3 years ago
5 0

Answer:

-2(3x-10y+8)      

you have to distribute -2 to all the numbers inside the parenthesis which will give you  -6x+20y-16

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If w = 10 units, x= 5 units, and y= 6 units, what is the surface area of the figure?
qwelly [4]

Answer:

  456.2 units²

Step-by-step explanation:

The area of the square base is ...

  base area = w² = (10 units)² = 100 units²

The lateral area is 4 times the area of one rectangular face:

  lateral area = 4wx = 4(10 units)(5 units) = 200 units²

The area of one triangular face is half the product of its base length (w) and its slant height (h). The latter is found using the Pythagorean theorem:

  h² = y² +(w/2)² = (6 units)² +((10 units)/2)² = 61 units²

  h = √61 units

So, the area of 4 triangles is ...

  area of triangular faces = 4(1/2)wh = 2(10 units)(√61 units) ≈ 156.2 units²

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Now we have the areas of the parts, so we can add them together to get the total surface area:

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4 0
3 years ago
Write a linear function F with the values F(-9)=8 and F (0) =1
Fiesta28 [93]

Given:

The values of a linear function are F(-9)=8 and F(0)=1.

To find:

The linear function.

Solution:

If a linear function passes through two points, then the equation of the linear function is:

y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)

The values of a linear function are F(-9)=8 and F(0)=1. It means the function passes through the points (-9,8) and (0,1). So, the equation of the linear function is:

y-8=\dfrac{1-8}{0-(-9)}(x-(-9))

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y-8=\dfrac{-7}{9}(x)+\dfrac{-7}{9}(9)

y-8=\dfrac{-7}{9}x-7

Adding 8 on both sides, we get

y-8+8=\dfrac{-7}{9}x-7+8

y=\dfrac{-7}{9}x+1

Putting y=F(x), we get

F(x)=\dfrac{-7}{9}x+1

Therefore, the required linear function is F(x)=\dfrac{-7}{9}x+1.

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