Answer:
f(- 3) = - 27
Step-by-step explanation:
substitute x = - 3 into the expression
f(- 3) = 9 + (12 × - 3 ) = 9 + (- 36) = 9 - 36 = - 27
Answer:
-36 = k
Step-by-step explanation:
-3 = k/12
Multiply each side by 12
-3*12 = k/12 *12
-36 = k
30/3= 10(if you do 30 divide by 3 then you need to divide 24 by 3 to)
24/3= 8
10x2= 20(same if you do 10 time 2 then you need to do 8 times 2)
8x2= 16
then add 30 and 24 with 20 and 16.
answer:40 in 50 sec
Let the age of Jen 2 years later be x,
age of jack two years later = 2x
total age of jack and jen now = 2x + x - 2 - 2
= 3x - 4
3x - 4 = 66
3x = 70
x = 70/3
= 23.3 (to three significant figures)
age of jen now = x - 2
= 23.3 - 2
= 21.3
Jen is 21.3 years old now.