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VLD [36.1K]
4 years ago
11

PLEASE HELP! I will give brainliest! If an object is dropped from a tall building, then the distance (in feet) it has fallen aft

er t seconds is given by the function d(t)=16t^2.
Determine the average speed (rate of change) between 3 and 8 seconds.
Mathematics
1 answer:
siniylev [52]4 years ago
8 0

Answer:

160ms^{-1}

Step-by-step explanation:

d(t)=16t^2\\

To work out rate of change of a function, you must differentiate it.

\frac{\Delta d(t)}{\Delta t} =32t

d'(8)-d'(3)=32*8 - 32*3=32*5=160ms^{-1}

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I need help please. Also check out my other question
siniylev [52]

Answer:

<h3><u>8 Km.</u></h3>

Explanation:

  • I'm going to turn the fractions into decimals

2 ½: 2.5

3 ⅕: 3.2

  • Formula for the area of a parallelogram: A = b(h)

Base: 3.2

Height: 2.5

3.2 · 2.5 = 8

<h3><u>The area of the parallelogram is 8 Km.</u></h3>
5 0
3 years ago
I need to find x by factoring but I was absent the day we reviewed and forgot from last year: the question is: If x^2+3x = 9x -8
rosijanka [135]

x²+3x = 9x - 8

Subtract 9x on both sides

x² - 6x = -8

Add 8 on both sides

x² - 6x + 8 = 0

Now you need to find the factors of 8(numbers that multiply to equal 8) that add or subtract to -6.

Factors of 8: 1, 2, 4, 8

2 and 4 add up to 6, if they are both negative they equal -6.

(x - 2)(x - 4) = 0

x - 2 = 0

x = 2


x - 4 = 0

x = 4


x = 2, x = 4

5 0
3 years ago
Solve each system by substitution. y=3x+4 y=4x+7
Y_Kistochka [10]

We need to solve the following system by substituition:

\begin{cases}y=3x+4 \\ y=4x+7\end{cases}

To solve by substituition means that we need to isolate one variable in one of the equations and replace one expression with the other. This is done below:

\begin{gathered} (3x+4)=4x+7 \\ 3x+4=4x+7 \\ 3x-4x=7-4 \\ -x=3 \\ x=-3 \end{gathered}

Then we need to replace the value of "x" in any of the two equations.

\begin{gathered} y=3\cdot(-3)+4 \\ y=-9+4 \\ y=-5 \end{gathered}

The solution is (-3,-5).

4 0
1 year ago
Find the value of the variable and yz if y is between x and z xy=5p yz=p xy=25
fiasKO [112]
P is 5 , so yz=5 that’s the answer


they gave you that xy=25 and in the same time xy=5p , 5p should be 25 that’s why p is 5
7 0
4 years ago
If AB = 9 and BC = 12 then what is AC?
dimaraw [331]

Answer:

AC = 12 cm

Step-by-step explanation:

AB=9 centimeters, you figure out what times what is 9. in this case, it is 3 for A and B. Then you go to BC=12 and 3 for B and 4 for C making it 12 So AC would equal 3x4.

4 0
3 years ago
Read 2 more answers
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