Answer:
Step-by-step explanation:
domain of x (-∞,∞)
Answer:
13
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean Theorem

where<em> a</em> and <em>b</em> are the legs and <em>c</em> is the hypotenuse.
We know that the legs are 5 and 12. We also know the hypotenuse is x, or unknown.
Substitute 5 in for <em>a</em>, 12 for <em>b, </em>and x for <em>c.</em>
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Evaluate the exponents.
5^2 is the same as 5*5, which is 25.
12^2 is the same as 12*12, which is 144.

Add 25 and 144

We are trying to find out what <em>x</em> is. In order to do this, we have to get <em>x</em> alone. Since x is being squared, take the square root of both sides. The exponent and square root will cancel, leaving x by itself.

The hypotenuse is 13.
Answer:
y=2x+11
Step-by-step explanation:
y-5=2(x+3)
y-5=2x+6
+5 +5
y=2x+11
5 routes to go to school library
and 6 routes from the library to back home:
So she has 5 ways to be chosen & 6 ways (back home) to be chosen. then she has all in 5x6 ways = 30 ways