The answer to find QS
2 answers:
Answer:
The measure of QS is 68 units.
Step-by-step explanation:
Given information: R is midpoint of QS, RS=2x-4, ST=4x-1, and RT=8x-43.
We need to find the value of QS.
From the given figure it is clear that points Q, R, S and T are collinear.
On combining like terms.
Isolate variable terms.
Divide both sides by 2.
The value of x is 19.
It is given that R is midpoint of QS. It means R divides the line QS in two equal parts.
Substitute x=19 in the above equation.
Therefore the measure of QS is 68 units.
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answer:
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 , where (p,q) is the turning point. now we substitute the turning point
, 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