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2 years ago

Please help I do not understand

Mathematics

2 answers:

Murljashka [212]2 years ago

5 0

The answer is 8 Feet i think

zlopas [31]2 years ago

3 0

If you dont have it do 64 divided by 1/2 and should get your answer

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What is the value of the expression <br><br> 3.2(2.3)-4.8

Artist 52 [7]

The value of the equation is 2.56

8 0

2 years ago

Sean tossed a coin off a bridge into the stream below. The path of the coin can be represented by the equation 2 h tt = − 16t^2+

tekilochka [14]

Answer:

It will take 5.61 seconds for the coin to reach the stream.

Step-by-step explanation:

The height of the coin, after t seconds, is given by the following equation:

$h(t) = -16t^{2} + 72t + 100$

How long will it take the coin to reach the stream?

The stream is the ground level.

So the coin reaches the stream when h(t) = 0.

$h(t) = -16t^{2} + 72t + 100$

$-16t^{2} + 72t + 100 = 0$

Multiplying by (-1)

$16t^{2} - 72t - 100 = 0$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$16t^{2} - 72t - 100 = 0$

$a = 16, b = -72, c = -100$

$\bigtriangleup = (-72)^{2} - 4*16*(-100) = 11584$

$t_{1} = \frac{-(-72) + \sqrt{11584}}{2*16} = 5.61$

$t_{2} = \frac{-(-72) - \sqrt{11584}}{2*16} = -1.11$

Time is a positive measure, so we take the positive value.

It will take 5.61 seconds for the coin to reach the stream.

3 0

3 years ago

Learning Task 1: Find the value of th

shepuryov [24]

Answer:

a=5your answer right answer right answer

8 0

3 years ago

Helppppp pleasee....

irina1246 [14]

Independent variable: the variable that affects the dependent variable and creates a change
Dependent variable: depends on the independent variable

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Dependent variable: height

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Dependent: cups of milk

3. Independent: population
Dependent: number of representatives

4. Independent: Number of seats
Dependent: amount of tickets

5. Independent: time
Dependent: plane’s altitude

6. Independent: more music download
Dependent: more money spent

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2 years ago

A person with type O blood can donate red blood cells to anybody because type O blood is the universal donor blood type. About 4

Zanzabum

Answer:

96299

Step-by-step explanation:

4 0

3 years ago

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