NEED HELP WITH ALL PLEASE! ❤️

a) If angle 0 = 86.88°, express angle 0
in degrees and minutes to the nearest minute

b) Use a calculator to evaluate tan 39°58' correct to 4 decimal places

c) Use your calculator to find the size of angle (to the nearest minute) if
cos 0 = 0.8133
Answer is: 0 =

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.

-x represents miles per gallon

-y represents cargo weight

-vehicle traveled an average of 5.3 miles per gallon(x1) with load of 22 tons (y1)

- vehicle traveled an average of 6.3 miles per gallon( x2) with load of 18 tons( y2)

so, equation now becomes

so, option a) is correct