Answer:

Step-by-step explanation:
Q1.


Q2.
<em>look at the picture</em>
210° is in III Quadrant. Therefore the reference angle for θ is:
210° - 180° = 30°
All you have to do to find what number a certain number is a certain percentage of is to divide the known number by the percentage that it is reduced by.
To do this, we must first convert the percentage into a decimal. To do this, we can either divide the percentage by 100, or (my personal shortcut) just shift the decimal point over two places to the left.
40% = 0.4
Now, we divide the known by the percentage/decimal.
72 / 0.4 = 180
72 is 40% of 180.
Hope that helped! =)
Step-by-step explanation:
In set a, every element in the domain has only 1 image in the range. This is called a one-to-one correspondence.
However in set b, there is a many-to-one correspondence as more than 1 element in the domain has the same image.
Answer:
Step-by-step explanation:
4x+3x=7x
-3x-2x-3x-2x=-10x
2+2=4
-3x & 4