14 ribbons.
7 divided by 1/2 is 14. dividing by a fraction or decimal is just like multiplying without the decimal point or numerator.
129 degrees is the correct answer for the missing angle number 1 :)
Answer:
x= -1/3
x = -7
Step-by-step explanation:
9x^2 +66x+21 = 0
a=9 b=66 c=21
quadratic formula
x=(-b +/- square root of (b^2 – 4ac))/(2a)
x = (-66 +/- square root of (66^2 -4*9*21))/(2*9)
x = (-66 +/- square root of (4356 -756))/(18)
x = (-66 +/- square root of (3600))/(18)
x = (-66 +/- 60)/18
split the fraction
(-66 +/- 60)/18 = -6/18 and -126/18 because of the +/-
x = -6/18 x = -126/18
x = -1/3 x = -7
Answer:
6
Step-by-step explanation:
I'm sorry if it wrong.