C an increased leg length causes a decrease in the time of a mile run I believe
Package A: 5kg, Package B: 10kg
Use a system of equations to find the weight of each package. Set up two equations with the knowledge you know about the combined weight of the packages, using 'a' as the variable for Package A and 'b' as the variable for Package B.
5a + 6b = 85kg and 10a + 4b = 90kg
Take the second equation and solve for a, which you will use to substitute into first equation. Subtract 4b from both sides and divide everything by 10.
10a = 90kg - 4b
a = 9kg - 2/5b
Plug a = 9kg - 2/5b into the equation 5a + 6b = 85kg.
5(9kg - 2/5b) + 6b = 85kg
45kg - 2b + 6b = 85kg
45kg + 4b = 85kg
4b = 40kg
b = 10kg
Put 10kg in for b for one of the equations and solve for a.
10a + 4(10kg) = 90kg
10a + 40kg = 90kg
10a = 50kg
a = 5kg
The weight of Package A is 5kg and the weight of package B is 10kg.
A rotation of 90 degrees changes (x,y) to (-y,x). If the original coordinates if point F is (0,3), after a rotation of 90 degrees it would be (-3,0).
Hi mathsupersaver1 the first one will be the correct one
Answer:
The answer is hardness
Step-by-step explanation: