The diagonals are congruent
Answer:

Step-by-step explanation:
2w - 5 = w + 10
-2w - 2w
___________
−5 = −w + 10
-10 - 10
__________
−15 = −w

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Answer:
X would be x < 9
Step-by-step explanation:
You would do this equation like any other equation, but with the equal sign being greater or less than. So you would add 4 on both sides to get x < 9
6:15, I got that because every 2 out of 5 tiles is white, so it’s basically 2/5, we have to get the denominator (5) to 15. So we have to multiply 3 on both sides. Because 5*3=15 and what we do to the bottom also happens to the top. So 2*3=6. So every 6 tiles out of 15 will be white. The ratio will be 6:15. Hope that helps