Answer: r - 24
Step-by-step explanation:
Combine like terms;
Solve the quadratic equation;
Simplify;
Sin (x/4) = 1/2
x/4 = sin⁻¹ 1/2
x/4 = 45
x = 45*4
x = 180
So, your final answer is 180
Hope this helps!
Answer:
D
Step-by-step explanation:$400x.30=$120
400-120=280
$280x.10=28
280-28=252
Answer: half the number?
If you write an equation for it:
Let the number be x
1/2x = x - 1/2x
2 classes of 21 students each
21 × 2 classes = 42 students in total
42 × 3 mins = 126 minutes for 42 students
10 mins for 2 class pics = 20 minutes
126 + 20 = 146 minutes = 2 hours and 26 minutes
It should take 146 minutes (2 hours and 26 minutes) to take all the pictures.