Answer:
7.2/3 ± (isqrt2)/3
8.2±i
9.-0.4±0.2
10.1/3±1/3sqrt19
Step-by-step explanation:
7. a =3, b=-4, c=2
plugging in to the quadratic formula
(2 ± isqrt2)/3
8.a=1,b=-4.c=5
plugging in to the quadratic formula
2±i
9.a=5,b=4,c=2
plugging in to the quadratic formula
-0.4±0.2
10.a=-3,b=2,c=6
plugging in to the quadratic formula
1/3±1/3sqrt19
Answer:
AC=1.879
Step-by-step explanation:
cos(20°)=x/2
cos(20°)·2=x
*plug into the calculator*
x=1.879
Answer:
42
Step-by-step explanation:
You would divide the 84 by 2
Step-by-step explanation:
Perimeter = 16
length = 3x
height = x
P = 2L + 2H
16 = 2(3x) + 2(x)
16 = 8x
hence:
x = 2.
(a) The gradient is
, and represents the cost of buying one book in dollars.
(b) Draw the line through (0,0) and (20, 130).
(c) Since the gradient of the line representing company B is less (6.5 vs 8), it is better to buy books from company B because they are cheaper.