Answer:
This quadratic equation has 2 solutions.
Step-by-step explanation:
I assume the '?' in your question is meant to be power 2 (²), or else it would not be a quadratic equation. You could write it using the superscript version of 2.
We can solve this equation by expressing it in the form: ax² + bx + c
x² + 9x= -8
x² + 9x + 8 = 0
Now if you know the discriminant, you can simply plug in your values of a, b, and c to see how many solutions there are.
In this case, you would not need the discriminant as there are whole-number factors and hence this can simply be factorised.
x² + 9x + 8 = 0
(x + 8)(x + 1) = 0
For this equation to be true (= 0), x can equal -8 OR -1.
Hence, this quadratic equation has 2 solutions.
Blue: = because the equal sign is stating that it’s the same.
Answer:
20
Step-by-step explanation:
Answer:
The answer are the options B and C


Step-by-step explanation:
we know that

In this problem we have

substitute

solve for sin(x)


substitute the value of sin(x) and solve for cos(x)






The function tangent is equal to

substitute the values

Step-by-step explanation:
The correct numbers are
4 = 5
8 = 10
12 = 15
16 = 20
20 = 25
Hope it will help :)❤