Answer:
32.9 degrees
Step-by-step explanation:
cos (x) = 21/25
cos^1 (21/25)
= 32.856 --> round to 32.9
Answer:
Step-by-step explanation:
<u>As per the graph, the line has:</u>
- y-intercept (0, -4.5)
- x-intercept (1, 0)
Substitute the values and verify each equation.
<u>This gives us one correct equation:</u>
<u>Proof:</u>
- x = 0 ⇒ -2y = 9 ⇒ y = -4.5
- y = 0 ⇒ 9x = 9 ⇒ x = 1
1.994 x 10^-23
-0.167 x 10^-23
1.827 x 10^-23
Correct answer is the second one.
Answer:
x(1,2) = -5 ± √61) / (-2)
Step-by-step explanation:
The ABC formula of quadratic equation states
x(1,2) = (-b ± √b^2 - 4ac) / 2a
-x^2 + 5x + 9 = 0
a = -1
b = 5
c = 9
Thus x(1,2) = (-b ± √b^2 - 4ac) / 2a
= (-5 ± √(-5)^2 - 4*(-1)*9) / 2*(-1)
= (-5 ± √25+36) / (-2)
= (-5 ± √61) / (-2)