Answer:
2x + 2y + 2
Step-by-step explanation:
x+ 2y + x +2 (combine like terms)
x + x + 2y + 2
2x + 2y + 2
Answer:
Step-by-step explanation:
Add the total number of students:
Boys: 8, + Girls: 12 = 20 students
of the students are girls
6/10 also equates to 60%, which is the percent of girls in the class.
22 dollars + 39 dollars = 61 dollars
100-61= 39 dollars. She needs $39 more
Answer:
1222 billion dollars.
Step-by-step explanation:
To find the total increase from 1960 to 2010, we need to find the growth of each decade and sum them all:
In the period 1960-1970, we have x = 1, and the growth is:

In the period 1970-1980, we have x = 2, and the growth is:

The growth in the following 3 periods are:



So the total growth in the period 1960 - 2010 is:



Rounding to the nearest billion dollars, we have a total of 1222 billion dollars.