Instead of subtracting 6 from 12 then dividing they added 6 to 12 & ended up with 18. 18 by 2 is 9.
-15+2 means you add 2 to the negative number 15 so -15+2 will give us -13 which is the answer.
80+70=150
270/150=1.8 hours before the two trains are 270 miles apart
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Answer:
Step-by-step explanation:
The triangle is recognizable as a 30°-60°-90° right triangle, which has side length ratios ...
1 : √3 : 2
Side x is thus twice the length of short side 4, so x = 8.
Side y is √3 times the length of short side x-6 = 2, so y = 2√3.
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If you don't happen to recognize the triangle dimensions, you can find x and y using the Pythagorean theorem.
x = √(4² +(4√3)²) = √64 = 8
y = √(4² -2²) = √12 = 2√3
The answer would be 10. You add all of the numbers together then divid by the amount of numbers there are. For example 6+10+9+11=40. Because there are 4 numbers, you divid 40 by 4 to get 10:) hope this helps!
