Math Games

Question: triangular maths (ON DS/BRAIN GAME)?

6 2 7
- +
-

=

the sum looks a little like this, i can do them if they are all + just when they is a - in the sum i do not understand, can some one explain how i do this,

for those with a DS it is the brain game, it does explain how to do the sums but i do not understand,can someone explain in simple terms i am thick

thank you x kitti x

Answer: Break it down like this:

6-2 = 4

2+7 = 9

4-9 =-5 But you only need to enter 5 in the box as DS puts the - sign in front for you.

Mathematically this would be written

((6-2)-(2+7))

My Nintendo Ds Game collection

Question: Help with math????????????????

Compare and Contrast the graph of y= x+2 and the graph of y< x+2.
And
Explain why it is usually only necessary to test one point when graphing and inequality.
And
Coach Riley wants to take her softball team out for pizza and soft drinks after the last game of the season. She doesn't want to spend more than $60. Write and inequality the represents this situation.

If anyone can answer any of these 3 questions, it would mean a lot to me. Thx!:)

Answer: the graph of y = x + 2 is just THE line versus
the graph of y < x + 2 is the REGION below the line

it's only necessary to test one point IF you're testing the critical point... ie if you're testing if a certain region will satisfy the equation, and if you can find just one point that's not true, you're done. However, finding points that works doesn't necessarily mean all points work.

let P = pizza, and D = drinks

the cost of P and D together: P + D
can not be greater than $60: $60>

so : $60 > P + D

good luck

TI-89 Titanium Episode 2: Solving Systems of Linear Inequalities