Answer:
3×y+5=15
Step-by-step explanation:
Product means multiplication
Use a variable to replace the unknown number
Plus five is equal to fifteen.
Cross multiply to solve
(-3r)(4)=(-27)(2)
Multiply on both sides
-12r=-54
Divide both sides by -12
r=4.5
Final answer: r=4.5
Check:
-3(4.5)= -13.5
-13.5/2= -6.75
-27/4=-6.75
Answer:
c=1
Step-by-step explanation:
subtract 1 with 10, outcome is 1. subtract both sides by 9 to deduct the 9. and you get 1
Answer:
3
Step-by-step explanation:
Inverse functions "undo" each other. f(g(3)) = 3, the number you start with.
To see this in the context of this problem...
g(3) = 3/5, f(g(3)) = f( 3/5 ) = 5(3/5) = 15/5 = 3.
g changes the input 3 to its output 3/5. f changes input 3/5 back to the original value 3
Real-life inverses: lock/unlock code a message/decode a message.