Answer:
The answer is "0.58 in both choices".
Step-by-step explanation:
Its association relies not on unit changes from either a single variable. So,
In point a:
Weight-in-pound association with height (in yards)
Weight (in pounds) correlation with height (in feet)
= 0.58
In point b:
Weight (in kilogram) or height association (in meters)
= Weight (in pounds) association to height (in feet)
= 0.58
Answer: 16 litres
Step-by-step explanation:
A: 1l x km
B: 1l x+5 km
Running 400 km A used 400/x litres
Running 400 km B used 400/(x+5) litres
400/x- 400/(x+5)= 4
400*(x+5)- x*400-4*x*(x+5)=0
400*x+2000-400*x-4*x²-20*x=0
2000-4*x²-20*x=0 difide by 4 both sides of equation
500-x²-5*x=0
Lets solve the equation using discriminant:
D=5²-(-1)*4*500=2025
sqrt(D)=45
x1= (5+45)/(-2)= -25 x2=(5-45)/(-2)=20
x1=-25 x2=20
x1<0 so is not the solution of the problem ( number of litres can't be negative)
So A uses litr per x=20 km and B uses 1 litr per 20+5=25 km
Running 400 km B uses 400/25=16 litres
Since the height and base are given those are the lengths of the 2 side lengths so to find the perimeter we do 4.8+4.8+8.4+8.4
the answer should be 26.4!
Answer:
I don't know
Step-by-step explanation:I need the answer
