What two letters don't appear on the telephone dial

Mathematics

2 answers:

Elden [556K]3 years ago

7 0

Answer:

Step-by-step explanation:

Q and X

vekshin13 years ago

6 0

Answer:

Two letters that don't appear is q and z.

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Pls help xdcdcdcdcdcd

AysviL [449]

Answer:

Step-by-step explanation:

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6 0

3 years ago

F(x)=-x^2+8x+15 ...?

rusak2 [61]

Here i how I would do it:f(x)=−x2+8x+15
set f(x) = 0 to find the points at which the graph crosses the x-axis. So−x2+8x+15=0
multiply through by -1x2−8x−15=0 (x−4)2−31=0 x=4±31−−√
So these are the points at which the graph crosses the x-axis. To find the point where it crosses the y-axis, set x=0 in your original equation to get 15. Now because of the negative on the x^2, your graph will be an upside down parabola, going through(0,15),(4−31−−√,0)and(4+31−−√,0)
To find the coordinates of the maximum (it is maximum) of the graph, you take a look at the completed square method above. Since we multiplied through by -1, we need to multiply through by it again to get:f(x)=31−(x−4)2
Now this is maximal when x=4, because x=4 causes -(x-4)^2 to vanish. So the coordinates of the maximum are (4,y). To find the y, simply substitute x=4 into the equation f(x) to give y = 31. So it agrees with the mighty Satellite: (4,31) is the vertex.

8 0

3 years ago

Triangle congruence and similarity! (picture included)

skelet666 [1.2K]

Answer:

yes; SAS (Side Angle Side)

Step-by-step explanation:

if you divide all sides by three they come out as the same numbers as the left triangle and they are both the same type of triangle

8 0

2 years ago

-10t+8+-2t=16 I need help!

Nutka1998 [239]