Mark starts a rock climb when he is 1 mile above sea level. he can climb at the rate of 1.5 miles per hour. which of the following functions would express mark's height above sea level over time? f(x) = 1.5x f(x) = 1 + 1.5x f(x) = 2.5x explain how you got your answer

The answer is f(x) = 1 + 1.5x

Step-by-step explanation:

If Mark started a rock climb when he was 1 mile above sea level, and we're trying to find Mark's height above sea level over time, we would need to add 1 to our function.  And since he climbed 1.5 miles an hour(x) you must add that as well.  So far, we have, 1 + 1.5x.

Therefore, the answer would be f(x) = 1 + 1.5x.

Hope I helped :)

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

4.6875 pounds

step-by-step explanation: