I do belive the first one is 30
Answer:
work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. % increase = Increase ÷ Original Number × 100. If your answer is a negative number, then this is a percentage decrease.
Step-by-step explanation:
Answer:
4.5
Step-by-step explanation:
First you need to know its common factors.
They are: 1, 3, 5, 9, 15, 45
And 45 = 1*45 = 3*15 = 5*9
So there should be 3 ways in total
Answer:
x= -1
Step-by-step explanation:
First add 2x to the 7x it will look like this
9=9x
Now you need x by itself so divide 9 on both sides it will look like this
1=x and thats your answer just swap the x and the 1