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HACTEHA [7]
3 years ago
8

I don't understand any of these questions

Mathematics
2 answers:
Xelga [282]3 years ago
6 0
20 because there are many more
CaHeK987 [17]3 years ago
5 0

1.Its either 9 or 10

3.The answer should be 20

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Can someone help this is due at 11:59 today I need help on all the problems and how to do them basically the answer please and t
PIT_PIT [208]

Answer: 1. Yes

Step-by-step explanation: They are paralell because they create a straight line and will never interscect each other

3 0
2 years ago
f(x) = −16x2 + 24x + 16 Part A: What are the x-intercepts of the graph of f(x)? Show your work. (2 points) WILL GIVE BRAINLIEST
castortr0y [4]

Answer:

Step-by-step explanation:

f(x) = −16x2 + 24x + 16 = 0 can be reduced to -2x^2 + 3x + 2 = 0 and then to 2x^2 - 3x - 2 = 0.  Solve this for x using the quadratic formula:

The discriminant is b^2 - 4ac = (-3)^2 - 4(2)(-2) = 9 + 16 = 25.

Therefore the roots are:

     -(-3) ± √25        3 ± 5

x = ----------------- = ------------  =>  x = 2 and x = -1/2

           2(2)                  4

The x-intercepts are points:  (2, 0) and (-1/2, 0)

Because the coefficient of the x^2 term is negative, this graph opens down and the vertex represents a maximum.

To graph this function, find and plot the vertex.  It is exactly halfway between the x-intercepts, that is, at x = 1 1/4, for which the y value is 21:

vertex and maximum at (5/4, 21)

Finally, find the y-intercept.  Let x = 0; we find that y = 16.  The y-intercept is 0, 16)

We now have four points on the graph and know where the maximum is.  Plot this max (5/4, 21) and the x-intercepts (2, 0) and (-1/2, 0), and finally the y-intercept.  Draw a smooth curve through these points, remembering that the graph is symmetrical about the axis of symmetry x = 5/4.

3 0
3 years ago
A survey related to professor effectiveness was administered to studentswho chose the professor as the chair of their doctoral c
kobusy [5.1K]

For this case we have different effectiveness using two conditions the first one with to students who chose the professor as the chair of their doctoral committe and the second is associated to all students and we see a different effectiveness

This is a clear example of an error in the A)Data Gathering Phase

And the reason is because they introduce bias in the study just selecting students who select the professor as the chair of their doctoral committee, and it's very evident when they select all the students the real results change

7 0
1 year ago
What is the value of n such that the expression x2 + 11x + n is a perfect square trinomial
algol [13]
30.25 because you divide 11 by 2 and square it. Hope this helps :)
3 0
3 years ago
In the diagram at below, m m I need help understanding this, please help!!!
tensa zangetsu [6.8K]

Answer:

m<BAC= 110 degrees

Step-by-step explanation:

Since the outside angle m<BCD is 130 degrees the inside angle m<BCA would be 50 degrees. At this point you should know that inside angles of a triangle add up to 180 degrees so add the two angles that you know then subtract from 180 degrees. 50+20= 70 degrees and 180-70= 110 degrees.

4 0
3 years ago
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