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IgorLugansk [536]
3 years ago
7

X-y=-5 x-y=1^3 help pleas --- solve equations by substitution.

Mathematics
1 answer:
V125BC [204]3 years ago
7 0

Heya!

Answer is No \: Solution

<u>EXPLANATION</u><u> </u><u>:</u><u>-</u>

Given

x-y= -5

x-y=1³

Substitute value of x - y as 1³ in first equation,

=> x-y= -5

=> 1³ = -5

As we can't do anything more to solve, we can finally write as :

No \: Solution

~ Benjemin360

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Which of these statements is true for f(x) = (1/2)^x
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<h3>Answer:  D) The y intercept is (0,1)</h3>

This can be confirmed by plugging x = 0 into the function to find that...

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Recall that any nonzero value to the 0th power leads to 1. So we can say x^0 = 1 as long as x is not zero.

---------------

Extra info (optional section):

  • We can rule out choice A because negative x values work in the domain. For instance, if x = -1, then it leads to y = (1/2)^x = (1/2)^(-1) = 2. The negative exponent will apply the reciprocal operation to the base fraction.
  • Choice B can also be ruled out because the range is y > 0. Or you could note that it is possible to get positive y values smaller than 1/2. Try x = 2 and you'll see it leads to y = 1/4 which is not greater than 1/2.
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