11 because -7 subtracted by 4 add kore to the 7 so think of it this way -7 is a bad guy and 4 is a bad guy to because its a subtraction so if both bad guys combine you get 11 because a negative with negative makes a positive so its 11
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I will help you just tell me what grade your in and i will help
1/2 of the beads will be blue, and 1/2 of them would be red Hope this helped!