Sat 数学历年真题

Label the right angle as 90° on the graph.

Write an equation for x.

x + 110° + 30° + 90° = 360° vi

Simplify and finish up.

x = 360° - 110° - 30° - 90° x

= 130°

Tricky Part: Don’t get caught up with the 70°. Look at the picture again. SOV (x°) includes ROV (70°) so we don’t even need to use the 70°. They just put it there to mess with us. C is the correct answer. Test 1 Section 3 Question 11

Algebra Problem. Again, make the variable our friend.

Let’s write our given: k divided by 7 gives a remainder of 6.

What are we looking for? The remainder when k + 2 is divided by 7.

First, what is a remainder? It’s the amount left over in division. Here’s an example: What’s the remainder when we divide 5 by 2? 2 r 1

2

iv 1 is the remainder in this example

Back to our problem. Write the skeleton of the problem, in this case just the division sign.

v

Now let’s fill it in with the given information. r 6

7

That looks a little more manageable.

What numbers work for k? Let’s try 7. Input 7 for k. 1 r 0