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3 years ago

11

A construction firm is building a skyscraper, and the height of the skyscraper in yards and feet after certain numbers of days i

s shown in the table below. What is the missing value in the table?

1 answer:

rjkz [21]3 years ago

4 0

Answer:

Step-by-step explanation:

do 10 then plus 20 = 20

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How do u find original price if the sales tax is 9%

podryga [215]

Multiply the 34.88 x .9 and the answer is the original cost (31.39)

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3 years ago

Explain how to calculate the surface area of a composite figure in your own words.

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To calculate the <span>surface area of a composite figure you must apply the formulas for calculate the area of each figure that is part of the composite figure and then, you must sum all the areas calculated.

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3 years ago

Read 2 more answers

Helpppp plss:)))))))<br>(the answer is not c though)

Anuta_ua [19.1K]

A i believe I could be wrong

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3 years ago

What interval includes all possible values of x, where –3(6 – 2x) ≥ 4x + 12

Tema [17]

Answer:

x≥20

Step-by-step explanation:

-3(6-2x)≥4x+12

or, -18+6x≥4x+12

or, -18-12≥4x-6x

or, -40≥-2x

or, -40/2≥-x

or, -20≥-x

or, 20≥x

= x≥20

7 0

2 years ago

The function f(t) = 4t2 − 8t + 6 shows the height from the ground f(t), in meters, of a roller coaster car at different times t.

gregori [183]

Answer:

The correct option is 3.

Step-by-step explanation:

The vertex form of a parabola is

$f(x)=a(x-h)^2+k$ .... (1)

where a, h, and k are integers, and interpret the vertex of f(t). (h,k) is the vertex of the parabola.

The given function is

$f(x)=4t^2-8t+6$

It can be written as

$f(x)=4(t^2-2t)+6$

If an expression is defined as $x^2+bx$ , then we need to add $(\frac{b}{2})^2$ to make it perfect square.

In the expression $t^2-2t$ the value of b is -2. So, we nned to add and subtract $(\frac{-2}{2})^2$ in the parenthesis.

$f(x)=4(t^2-2t+1^2-1^2)+6$

$f(x)=4(t^2-2t+1)+4(-1)+6$

$f(x)=4(t-1)^2-4+6$

$f(x)=4(t-1)^2+2$ .... (2)

The vertex form of the parabola is $f(x)=4(t-1)^2+2$ .

From (1) and (2), we get h=1 and k=2. It means the vertex of the parabola is (1,2). Vertex of upward parabola is point of minima. So the minimum height of the roller coaster is 2 meters from the ground.

Therefore the correct option is 3.

4 0

3 years ago