X(z + 3) + 1 + 3 − y; use x = 6, y = −5, and z = 2

39

Step-by-step explanation:

Given: x=6, y=-5, z=2

To solve this problem, plug all the variables in.

 x(z+3)+1+3-y

Plug in

=(6)[(2)+3]+1+3-(-5)

Take off parentheses

=6(2+3)+1+3+5

Add 2 and 3, and also add 1 and 3

=6(5)+4+5

Multiply 6 and 5, and add 4 and 5

=30+9

Add 30 and 9

=39

Hope this helps!! :)

Please let me know if you have any question

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92