Answer:
see below
Step-by-step explanation:
You can use the law of sines to choose the correct answer:
b/c = sin(B)/sin(C) ≈ 0.8
For the first answer choice,
sin(44.3)/sin(60.7) ≈ 0.8009 . . . . . . as close as you expect to get
____
The second answer choice has the wrong ratio of sines.
The third answer choice has B > C, which it cannot be since b < c.
_____
The law of cosines can be used to find "a":
a^2 = b^2 + c^2 -2bc·cos(A) = 102500-100000cos(75°) ≈ 76,618
a ≈ √76618 ≈ 276.8 . . . . . . matches the first answer choice
The degree of this polynomial is 3, so it has to have 3 roots or 3 zeros.
If it has one non-repeated x-intercept, that means that this polynomial has ine real zero.
So, it needs 2 more, and this 2 are complex zero.
Correct answer is B. One real and 2 complex zeroes.
subtract 3 from both sides:
Multiply both sides by 2:
Subtract 3 from both sides:
Change sign to both sides (this implies that you should also change the inequality sign):
Yintercepts are where x=0
set to zero to solve
0^2+4y^2=16
4y^2=16
divide 4
y^2=4
sqrt both sides
y=+/-2
xintercept is where y=0
x^2+4(0)^2=16
x^2+0=16
x^2=16
sdqrtboth sides
x=+/-4
yintercepts are (0,2) and (0,-2)
xintercepts are (4,0) and (-4,0)
The answer for that would be 20.75
