Answer:
17. 11x - 11y or 11x + (-11y)
18. -7.52 - 2.8 or -7.52 + (-2.8)
19. 41x - 21y - 6
20. -3y -8xy
Step-by-step explanation:
17. Use the distributive property.
18. Use the distributive property to multiply each number inside the parentheses by 0.4
19. Multiply each number inside the parenthese by 7.
20.Multiply each term in parenthese by y.
The expression is D) Binomial.
You need to learn reigonometry rules. SOH CAH and TOA
But for these questions you only need SOH and CAH.
To find x you need to use CAH which basically means Cos = Adjacent length/ Hypotenuse length because length x is touching the angle that means it is the adjacent one. so input your values into the equation
cos75 = x/8 and rearrange the values to find x
x= 8cos75
x= 2.07 your teacher may want the answer reduced to 1.s.f but you will need to ask them
To find y you need to use SOH which means sin= opposite length/ hypotenuse length
so input values
sin75= y/8 and rearrange
y= 8sin75
y = 7.73