The answer is D, i.e. the system was solved via elimination
If you multiply the first equation by 5, the system becomes
If you sum the two equations, you get
And so if you substitute the second equation of system A with this new equation, you'll get system B.
220= 45*x. I hope you are satisfied with my answer.
Answer:
The answer to your question is the letter D) 46°
Step-by-step explanation:
Data
length = 25 ft
Opposite side = 18 ft
Angle = Ф
To solve this problem, use trigonometric functions. The trigonometric function that relates the Opposite side and the hypotenuse is sine.
Sin Ф = Opposite side / hypotenuse
-Substitution
sin Ф = 18/25
-Simplification
sin Ф = 0.72
-Result
sin⁻¹ Ф = 0.72 = 46°
Step-by-step explanation:
c. ultraviolet energy
Answer:
0.784
Step-by-step explanation:
let's work backward.
The probabilty it will rain each day is 40%, so probabilty of dry weather is 1 - 40% = 60%
Probability of dry weather 3 day = 0.6*0.6*0.6 = 0.216
Hence, probability it will rain at least one of the 3 days = 1 - 0.216 = 0.784
