Answer:

Step-by-step explanation:
it's simple my dear friend.
first, she runs 3 miles per week.
so in

b is 3. the initial value.
increasement by 20% means she runs 1.2 times than before.

then a=1.2
so we have now:

and we got it!
Answer:
0.06
Step-by-step explanation:
D, because (5+y) and 8 are factors, and within (5+y), 5 and y are terms.
Answer:
2. domain: {3,4,5,6,7}; range: {2,3,4,5,6}
4. IS a function
Step-by-step explanation:
2. The <em>domain</em> is the list of first numbers of each pair.
The <em>range</em> is the list of second numbers.
4. If each value on the left only has <em>one arrow</em> coming from it, the relation <u>is</u> a function. That is the case here.
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Contrast that to the problem above (3.). In that one, the number 4 1/2 has two arrows coming from it. That relation is NOT a function.