You mean "four" erasers instead of "for" erasers which i corrected and solved.
Answer: You will pay 102Ghana cedis
Step-by-step explanation:
a pencil cells at 18 Ghana cedis
Three pencils will cost 3 x 18Ghana cedis=54 Ghana cedis
Also an eraser class at 12 Ghana cedis
Four erasers will cost 4 x 12 =48Ghana cedis
Total amount for three pencils and for erasers =54 Ghana cedis+48Ghana cedis=102Ghana cedis.
Answer:

Step-by-step explanation:
we know that
The equation of a exponential growth is equal to

where
a is the initial value
r is the rate of growth
x is the time in hours
y is the value of the quantity
we have

substitute


For x=22 hours
substitute

The sequence is
740, 707.60,675.20,642.80,...
Here first term is 740, and common difference, d is

Now we use the formula of nth term, which is

Substituting the values of a,n and d, we will get

Correct option is the second option .
x = 51.98
Step-by-step explanation:
tan 68 = opp/hyp = x/21
or
x = 21×tan68°
= 21(2.475)
= 51.98
Answer:
55
Step-by-step explanation:
3x-12=2x
+12
3x=2x +12
-2x
x=12
4(12)+ 9
48+9
=55