Answer: D
Suppose that 35\%35%35, percent of students in a school can sing their national anthem correctly. The music teacher takes an SRS of 303030 students from the population of 750750750 students at the school and finds that 40\%40%40, percent of students sampled can sing their national anthem correctly. The teacher plans to take more samples like this.
Step-by-step explanation: Khan Academy Explanation
Answer:
-2/9
Step-by-step explanation:
first you are going to distrubute 2/5, so 2/5 times x is 2/5x and 2/5 times -2 is -4/5
next you set up the problem with those two answers which gives you:
2/5x - 4/5 = 4x
then multiply both sides of the equation by 5: 2x-4=20x
next move the constant to the right side and chnage the sign: 2x=20x+4
then combine like terms: -18x=4
after that divide both sides of the equation by -18: -2/9
so x= -2/9
<span>To write 215% as a decimal you can approach the problem two ways. You can divide 215 by 100.
215/100 = 2.15
You can also move the decimal two places to the left 215.0 = 2.15
To write 2.15 as a fraction you will place 215 over 100. {215/100}. You will then want to write this fraction in it’s simplest form. The greatest common denominator is 5 so you will then divide the numerator and denominator by 5.
215/5 = 43
100/5 = 20
215/100 = 43/20
To write this fraction as a mixed fraction you would divide 43 by 20.
43 ÷ 20 = 2 with a remainder of 3
This is written as: 2 3/20</span>
Step-by-step explanation:
*cough cough*
