Answer:θ=41.3∘,138.7∘,221.3∘,318.7∘. Explanation: 3sin2θ−10(1−2sin2θ)=0. 23sin2θ−10=0. sin2θ=1023. sinθ=±√1023.
Step-by-step explanation:
So you would take the 360 cm and divide it by 2.5 cm or 1 inch to see how many inches the ceiling is.
360÷2.5= 144 inches
Answer:
x=-3
Step-by-step explanation:
The quadratic function 
determines the parabola which has the vertex at point (-3,5). The axis of symmetry passes through the vertex and is parallel to the y-axis. Hence, its equation is x=-3 (see attached diagram).
Answer:
<u><em>1st equation:</em></u>
Simplify the numerator
(zero divided by any number (other than zero) is zero)
1st equation is correct
<u><em>2nd equation:</em></u>
This is because a negative number divided by a positive number is a negative number.
So, 
is incorrect.
2nd equation is incorrect
The 1st stage: x, the 2nd stage: y.
x + y = 152
x = y + 28
y + 28 + y = 152
2 y = 152 - 28
2 y = 124
y = 124 : 2 = 62
x = 62 + 28 = 90
Answer: the first stage burns 90 seconds and the second burns 62 seconds.
