5y + 1
â 4 + 7x â 20y
Let f(x, y) = 7x + 4 5y + 1 . Then fx(x, y) = ________
B 3 m
C square root 12 m
D square root 18 m
HELP HELP HELp Due by the end of class
10.0 Points
3
Find the interquartile range for a data set having the five-number
summary: 4.6, 14.3, 19.7, 26.1, 31.2
A. 26.6
B. 11.8
C. 11.5
D. 15.1
Answer:
The age of Jenny=21 years
The age of Steve=9 years
Step-by-step explanation:
So... Let's make their age into unknown variables so it's easier to decipher:
Jenny's age: x
Steve's age: y
If 5 years ago Jenny was four times older than Steve the equation would look like:
y+12-4y=-15
First, you add like terms:
y+12-4y=-15
y-4y=-15-12
Now isolate the unknown variable:
3y=-27
y=9
But this was 5 years ago, and Jenny is 12 years older than Steve so add those two together:
9+12=21
Hope this helped!