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Andrei [34K]
2 years ago
13

Please,,, i'm begging you... help me with this and explain how you got the answer... i .. really need someones help.

Mathematics
2 answers:
GalinKa [24]2 years ago
7 0

A "function" is a black box, with a funnel on top, a little door on the  bottom, and a crank on the side.  The way it works is:  

-- You take a number, and call it 'x'.

-- You drop it into the funnel on top of the box, and you turn the crank.

-- Some gears, shafts, math operations and stuff inside the box do things to 'x', and eventually the little door on the bottom opens up and another number falls out.  

-- Before you even touch that one, you call it 'y', and then you pick it up and look at it.

The number that falls out is related somehow to 'x'.  It depends on 'x', AND on exactly what's inside the box ... how the gears and shafts and math operations are all hooked together.  All the guts and parts inside DETERMINE what the box will do to 'x', and how 'x' will get changed, and what will come out the bottom.

We call 'y' the FUNCTION of 'x'.

If you know exactly what's inside the box, then even before you drop 'x' into the funnel, you can always tell in advance WHAT will come out.

If you DON'T know what's inside, then the only way you can describe the function is to take a bunch of numbers, drop them into the function one at  a time, LOOK and SEE what comes out each time, and write it all down.

THAT's what this question is giving you.

What comes out is called the VALUE of the function for each 'x' that you drop in.  The table is giving you the VALUE of 'y' (the function) for seven different 'x's.  Then the question just wants you to look and see what falls out of the box when 'x' is -1 .

Look at the table.  It says that when 'x' is -1, 'y' is going to be <em>3 </em>.  That's the answer to the question.

We still don't know anything about what's inside the box.  We don't know the structure of the FUNCTION, and exactly what it does to 'x' to produce 'y'.  But we do know what'll fall out if we drop a -1 into the funnel ... because the table tells us !

Now, please get up off your knees.  It's unbecoming.  

horrorfan [7]2 years ago
6 0

Answer:

0

Step-by-step explanation:

Expressing this problem in different words, "find the value of the function defined by this table when x = -1."

x-values are in the first row.  See -1 there?  Input values are in this row. 

The corresponding y-values are in the second row.  Immediately beneath this -1, you see 0, or y = 0.  This is the value of this function at x = -1.  Because we have this table of values, we don't need to go any further into what the function itself looks like.

Thus, "when x = -1, y = 0."

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Answer pls for 30 points and brainliest​
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Answer:

your answer will be letter B

Step-by-step explanation:

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2 years ago
What is the graph for {3x+5y&lt;10 {x-y&lt;=1
Nostrana [21]
Sounds to me as tho you are to graph 3x+5y<10, and that after doing so you are to restrict the shaded answer area created by the "constraint" inequality x≤y+1.    OR x-1 ≤ y   OR  y≥x-1.  If this is the correct assumption, then please finish the last part of y our problem statement by typing   {x-y<=1}.

First graph 3x+5y = 10, using a dashed line instead of a solid line.

x-intercept will be 10/3 and y-intercept will be 2.  Now, because of the < symbol, shade the coordinate plane BELOW this dashed line.

Next, graph y=x-1.  y-intercept is -1 and x intercept is 1.  Shade the graph area ABOVE this solid line.

The 2 lines intersect at (1.875, 0.875).  To the LEFT of this point is a wedge-shaped area bounded by the 2 lines mentioned.  That wedge-shaped area is the solution set for this problem.
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3 years ago
PLEASE HELP ME.<br> THANKS!!!
Veronika [31]

Cos(x) = sin(x + 20o) Use the double cos angle formula

Cos(x) = sin(x)*cos(20) + cos(x)*sin(20) Divide through by cos(x). Tanx = sin(x)/cos(x)

1 = tan(x)*cos(20) + sin(20) Subtract sin(20) from both sides.

1 - sin(20) = tan(x)*cos(20) Calculate the value of 1 - sin(20)

0.65798 = tan(x) * 0.939692 Divide by cos(20)

tan(x) = 0.65795/0.939692

tan(x) = 0.70021 Take the inverse of 0.7) = tan(x)

x = tan-1(0.70021)

x = 35 degrees as expected.

Problem Two

The easiest way to do this is to pick random values and try it. The two acute angles are complementary. So 25 and 65 are random enough.

Let A = 25

Let C = 65

A

Tan(25) = sin(25)/sin(65) ; tan(25) = 0.4663.

sin(25)/sin(65) = 0.4663 Answer

B

Sin(90 - C) = Sin(A)

Tan(90 - A) = Tan(C)

So the question becomes Cos(A) = Tan(C) / sin(A)

Cos(25) = Tan(65)/Sin(25)

0.906 = ? 5.07 This statement isn't true.

C

Sin(65) = Cos(25)/Tan(65)

.906 = 0.4226 C is not the correct answer.

D

D isn't true. The tan does not relate that away. You can find it for yourself.

Cos(A) = Tan(C) You should get 0.906 = 2.14

E

Sin(C) = Cos(A) / Tan(A) I'll leave you to show this is wrong.

Problem 3

The diagram below is for this problem. Cos(x) = 50/100 = 0.5

x = cos-1(0.5)

x = 60 degrees.

Part 2

Sin(60) = opposite / hypotenuse

opposite = sin(60) * hypotenuse

opposite = 86.61 Be sure and round this to whatever the question says to round it to.



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lora16 [44]

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Step-by-step explanation:

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Answer:

is this helpful

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