ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
SAT Math 3.6 Numbers and Operations 208 Views
Share It!
Description:
SAT Math 3.6 Numbers and Operations
SAT Math 3.6 Numbers and Operations
Transcript
- 00:02
Put this in your calculator and shmoop it...
- 00:05
If a + b = 12, b + c = 17, and a + c = 9, what is the value of a + b + c?
- 00:14
And here are the potential answers...
- 00:18
If we push our way through the annoying crowd of variables...
- 00:21
...we'll find that what this question is actually asking
Full Transcript
- 00:24
is just for us to sum a, b, and c.
- 00:28
What if... we add up all three of the equations that are given to us?
- 00:32
In that case, we get a + b + b + c + a + c equals 12 + 17 + 9.
- 00:42
And if we combine all like terms...we get 2a + 2b + 2c equals 38.
- 00:52
Next, we can distribute the 2 to make the equation 2 times the quantity a + b + c... equals 38.
- 00:59
Divide both sides by 2, and our equation looks like this: a + b + c = 19.
- 01:04
Answer B.
Related Videos
SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?
In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...
Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...