Problem 7
Time is always an independent variable because time marches on doing its own thing without depending on external forces, or other people/things. Instead, other variables depend on time. In this case, the distance d depends on the independent variable t for time.
If the time goes up by 1 hour, then the distance variable goes up by 3 miles. In short, that tells us his speed is 3 mph.
Answer: Choice A) independent = time; dependent = distance
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Problem 8
Everywhere you see an x, replace it with 9. Then use PEMDAS to simplify
f(x) = 5x - 9
f(9) = 5(9) - 9 ... x replaced with 9
f(9) = 45 - 9
f(9) = 36
Answer: 36
68 letter 4 sec
17 letters 1 sec
510 letters 30 sec
:)
<h3><u>The value of a is equal to 34/12 or 17/6</u></h3>
10 + 3(4 - 6a) = -(6a + 12)
Distributive property.
10 + 12 - 18a = -6a - 12
Combine like terms.
22 - 18a = -6a - 12
Add 18a to both sides.
22 = 12a - 12
Add 12 to both sides.
34 = 12a
Divide both sides by 12.
a = 34/12 = 2.8
Sometimes.
The LCM of 6 and 7 is 42, but the LCM of 2 and 10 is 10 .
