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nadezda [96]
3 years ago
8

Help me Instead of typing random answers

Mathematics
2 answers:
ElenaW [278]3 years ago
8 0

Answer:

whats the question

Step-by-step explanation:

Andrej [43]3 years ago
4 0

Answer:

42

Step-by-step explanation:

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A rock is thrown upward from a bridge that is 57 feet above a road. The rock reaches its maximum height above the road 0.76 seco
bekas [8.4K]

answer:

f(t) = -9.9788169(t -0.76)^2 +57

Step-by-step explanation:

On this question we see that we are given two points on a certain graph that has a maximum point at 57 feet and in 0.76 seconds after it is thrown, we know can say this point is a turning point of a graph of the rock that is thrown as we are told that the function f determines the rocks height above the road (in feet) in terms of the  number of seconds t since the rock was thrown therefore this turning point coordinate can be written as (0.76, 57) as we are told the height represents y and x is represented by time in seconds. We are further given another point on the graph where the height is now 0 feet on the road then at this point its after 3.15 seconds in which the rock is thrown in therefore this coordinate is (3.15,0).

now we know if a rock is thrown it moves in a shape of a parabola which we see this equation is quadratic. Now we will use the turning point equation for a quadratic equation to get a equation for the height which the format is f(x)= a(x-p)^2 +q  , where (p,q) is the turning point. now we substitute the turning point

f(t) = a(t-0.76)^2 + 57, now we will substitute the other point on the graph or on the function that we found which is (3.15, 0) then solve for a.

0 = a(3.15 - 0.76)^2 + 57

-57 =a(2.39)^2  

-57 = a(5.7121)

-57/5.7121 =a

-9.9788169 = a      then we substitute a to get the quadratic equation therefore f is

f(t) = -9.9788169(t-0.76)^2 +57

4 0
2 years ago
You want to predict which candidate will likely be voted Seventh Grade Class President. There are 560 students in the seventh-gr
Inga [223]

Answer:

candidate b because it's mostly likely to have more people i think

7 0
2 years ago
You have two exponential functions. One function has the formula g(x) = 5 ^x . The other function has the formula h(x) = 5^-x .
Shkiper50 [21]
We are given with two functions here: h(x) is 5^-x and g(x) is 5^x . we are asked in the problem to determine the value of the expression (g-h)(x). In this case, we just have to employ subtraction to the given functions. That is 

(g-h)(x) = 5^x - 5^-x
             = 5^x -1/5^x
             = (5^2x -1)/5^x


 
4 0
3 years ago
Read 2 more answers
What is the length of side AB with endpointsA(–5, 3) and B(4, 3)? units
QveST [7]

Answer:

9 units

Step-by-step explanation:

the y value doesnt change, so the distance from -5 to 4 is 9 units

5 0
2 years ago
Read 2 more answers
What is the answer to this question 1.6x + 30
PolarNik [594]
What are you trying to find ?
5 0
2 years ago
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