Answer:
B: 9
Step-by-step explanation:
Answer:
m∠A= 110°
Step-by-step explanation:
∠A+∠B=180°
5x+20+9x-92=180°
14x=180+92-20
14x/14=252/14
x=18
m∠A=5x+20
= 5(18)+20
=90+20
m∠A=110
<u>----------------------</u>
hope it helps...
have a great day!!
20. (2) 14
A perfect square trinomial will factor into two expressions that are the same, for example: x^2 + 6x + 9 = (x + 3)(x + 3). Since this problem has a C value of 49, it will factor into (x + 7)(x + 7). 7 doubled is 14, therefore one possible value of B is 7.
21. (4) 2, -12
x^2 + 10x + 25 = 24 + 25
(x + 5)^2 = 49
x + 5 = +/- 7
x = 2, -12
22. (3) 3 + sqrt(17)
x^2 - 6x = 8
Complete the Square
x^2 - 6x + 9 = 8 + 9
(x - 3)^2 = 17
x - 3 = +/- sqrt(17)
x = 3 + sqrt(17), 3 - sqrt(17)
23. (1) 1, -5
x^2 + 4x - 5 = 0
x^2 + 4x = 5
x^2 + 4x + 4 = 5 + 4
(x + 2)^2 = 9
x + 2 = +/- 3
x = 1, -5
Hope this helps!
Answer:
The answer is
Step-by-step explanation:
5x² + 9x + 2 = 0
Using the quadratic formula that's
From the question
a = 5 , b = 9 , c = 2
We have
We have the final answer as
Hope this helps you
