Answer:
f(-1)=8
Step-by-step explanation:
Just plug in x=-1 into the function:
f(x)=6-2x
y=6-2(-1)
y=6+2
y=8
So f(-1)=8
Answer:
14.50x > 85
Step-by-step explanation:
14.50x > 85
divide both sides by 14.5
x>85/14.5 = 5.86 hours
x has to be greater than 5.86 hours
Answer:
25.04
Step-by-step explanation:
26.12-1.08
=25.04
Answer:
Rebecca is 12
Jennifer is 16
Step-by-step explanation:
28 - 4 = 24
24 : 2 = 12
12 + 4 = 16 (Jennifer)
28 - 16 = 12 (Rebecca)
Answer:
cosR = 
Step-by-step explanation:
assuming the right triangle has ∠ Q = 90° with legs 5 and 12
then this is a 5- 12- 13 right triangle with hypotenuse PR = 13 cm
then
cosR =
=
= 