discriminant= b^2-4ac= (-2)^2-4(4)(9)= -140<0
since discriminant <0, graph is always positive, x has no real roots
1) The ratio of used books to all books is 6:14
2) The ratio of used books to new books is 6:8
Answer:
x = 7.99 cm
Step-by-step explanation:
By applying cosine rule in the given triangle,
AC² = AB² + BC² - 2(AB)(AC)cosC
Substitute the measures of the sides and the angle in this formula,
x² = 6² + 10² - 2(6)(10)cos(53°)
x² = 36 + 100 - 72.217
x² = 63.782
x = √(63.782)
x = 7.99 cm
Answer:
79 because it cannot take two of the same number multiplied in order to get that answer.
Step-by-step explanation:
Answer:
0.3%
Step-by-step explanation:
80-50=30
30÷100
=0.3%