Answer:
a) 9 km
b) 18 km
c) She runs at a constant speed of 9 km/h
Step-by-step explanation:
The correct answer would be
A football pass of 9 yards
Answer:
two real, unequal roots
Step-by-step explanation:
y is definied as y = 3x - 1. Substitute 3x - 1 for y in xy = 9, obtaining:
x(3x - 1) = 9. Then:
3x^2 - x - 9 = 0. In this quadratic, the coefficients are a = 3, b = -1 and c = -9.
Calculating the discriminant b^2 - 4ac, we get (-1)^2 - 4(3)(-9), or 1 + 108, or 109. Because the discriminant is positive, we have two real, unequal roots.
Answer:
1.53
Step-by-step explanation:
because 21 minus 19.47= 1.53
Answer:
0
Step-by-step explanation: