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stiks02 [169]
3 years ago
5

The problem is in the picture. Please help. I am reviewing for the SAT.

Mathematics
2 answers:
Bad White [126]3 years ago
8 0

Answer:

  5

Step-by-step explanation:

The solutions are the solutions to the two equations ...

  • -5 = 2x +1   ⇒   x = -3
  • 5 = 2x +1   ⇒   x = 2

The difference between the solutions is 5.

_____

If you consider what the absolute value is doing, it is telling you twice the difference between x and -1/2 is 5:

  |2(x -(-1/2)}| = 5

  |x -(-1/2)| = 5/2

The solutions to this will be points on the number line that are 5/2 units either side of -1/2, so they will be 5 units apart.

Effectively, the answer to the question is 2(5/2) = 5, where 5 is the number on the right of the equation, and the 2 in the denominator is the coefficient of x.

The 2 in the numerator comes from the solutions being separated by twice the distance either solution is from x=-1/2.

Ludmilka [50]3 years ago
5 0

The absolute value of a quantity is 5 if that quantity is either 5 or -5.

So, the two solutions are

2x+1=5 \iff 2x=4 \iff x=2

2x+1=-5 \iff 2x=-6 \iff x=-3

Now, there is a bit of ambiguity here: we are not told who a and b are exactly, and yet the value of a-b depends on our choice.

If we choose a = 2 and b = -3, then the value of a-b is 5

If we choose a = -3 and b = 2, then the value of a-b is -5

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3 years ago
Your friend works different times on different days. She calculates her average hourly income using the expression 4(79.95 + 5.2
madreJ [45]

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If I were to guess I think C.product/sum

but don't take my word for it

Explanation:

It the beginning of the equation it is dividing for a product. Near the end it adds more numbers for a sum.

Good Luck.

Sorry if I am wrong ¯\_(ツ)_/¯

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mart [117]

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Step-by-step explanation:

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2 years ago
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A person is standing in the middle of a large plaza. The person randomly takes a step either north, south, east or west and then
ivolga24 [154]

Answer:

distance between 2 and 3 away from the origin (0,0)

Step-by-step explanation:

I tried this as a simulation.

Let y = a random number.

for x := 1 to 1000 do begin

for y := 1 to 5 do begin

a := random(4)+1;

if a := 1 then v:= v +1           That is he's going north

if a:=  2 then v:=v - 1           That is south

if a:= 3 then h := h + 1         west

if a :=4 then h :h - 1             east

end;

end;

I am running a thousand simulations  

This not my actual coding. I'm made it so that it runs 5000 times

You don't have to keep score of the distance until the end.

Most of the time it gives me a distance of between 2 and 3. The quadrants are random The horizontal distance and vertical distance come in at 2 and 3 respectively or -2 and 3 or 2 and - 3 or -2 or -3 etc.

Setting this up as a tree would almost give you as many branches as a tree outside your window.  But you can try drawing it you like. At least one of them.

What are the chances of you going straight east on a run

Wouldn't it be 1/4 * 1/4 * 1/4 * 1/4 * 1/4 = 1/1024 = 0.000976

Now imagine the tree branch for this. There are over 1000 branches that it could take.

So five steps going east would be  -1 + -1 + -1 +-1 + - 1 = - 5 = h

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Running this simulation occasionally does give 0.

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3 years ago
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snow_lady [41]

Step-by-step explanation:

1+6+8+9+7-5+81

= 107

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