Answer: D
Step-by-step explanation:
(x-9)² = x-3
(x-9) (x-9)= x-3
x² - 9x-9x +81 = x-3
x² -18x+81 =x-3
x²-19x+84 =0
(x-12)(x-7)=0
x=12 or 7
A response variable you are trying to measure once you've done the experiment.
What have you done? You've measured what sunglasses will do to affect eyesight. You have used a 10 week period to measure their response. You don't really care what the response is -- only if there is one.
10 people and 10 weeks don't change. Those two are not a choice for an answer. Now you come to the crunch of the question. Is it the sunglasses you are trying to measure or is it what your eyes have done because you were wearing sun glasses.
So we need an answer. If you say sun glasses, how did you measure what they did. THAT's the answer. The answer is not the sunglasses.
The ratio of students to teachers, is B, 8/1.
This is because if there are 24 students and 3 teachers, and you need to know the amount of students there would be per teacher, you divide both given numbers by 3.
24 divided by 3 is 8 (representing students)
and 3 divided by 3 is 1 (representing teachers)
Thus, the answer is 8/1
Answer:
130/100 = 13/10
Step-by-step explanation:
P(A or B)= 1 + 30/100 = 100+30/100 = 130/100
Answer:
x+3-5 i think
Step-by-step explanation:
"and" means add so x+3 and subtract 5
