Help! Tell me why to write to show work.

1.   19.

2.   -7.

Step-by-step explanation:

1.  Put x = 2 then simplify:

 f(x) = 2(3^x) + 1

 f(2) = 2(3^2) + 1

= 2*9 + 1

= 18 + 1

= 19.

2.   f(-3) = 4(-3) + 5

= -12 + 5

= -7.

Let's convert 5pi/3 into degrees first. to change radians back to degrees, multiply by 180/pi

so 5pi/3 * 180/pi would be 300

now we know we're finding the tangent of 300 degrees

plug in tan(300) in the calculator, and you get: -1.732050807568877 which roughly rounds to -1.732

hope this helps!

p.s. can i have brainliest?