15.1
First add all the numbers together
11+18+12+20+19+14+12=106
Then divide by the number of terms, in this case 7
106/7=15.1428571
Rounded to the nearest tenth:
15.1
Answer:
ask the teacher
Step-by-step explanation:
Well, a Centimeter is 10 times bigger than a Milimeter.
So we can convert 9cm by multiplying it by 10
9 × 10= 90mm
SInce we know the length and width of the rectangle, we can now find the area of it, or "the space inside".
Area = length × width
Area = 90mm × 81mm
Area = 7290mm
Let
x----------> Dewi quantity of money
y----------> Sheila quantity of money
we know that
(x-23)=(3/5)*y-------> equation 1
(y-42)=(4/5)*x-------> equation 2
using a graph tool----------> to calculate the system of equations
see the attached figure
the solution is the point (92.692,116.154)
x=92.692
y=116.154
Dewi quantity of money is $92.69
Sheila quantity of money is $116.15
the answer is
Dewi have $92.69
3(5)-15+10(7)-2(5)
15-15+70-10
=60
The answer is 60