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8.5

Step-by-step explanation:

5/2

Step-by-step explanation:

Since MR=MR and XM=MY and angle XMR = angle RMY,

then triangle XMR is congruent to triangle RMY by SAS postulate

Therefore, XR has to be equal to RY.

Making 6x+2=17

subtracting both sides by 2 gives you 6x=15

then dividing both sides by 6 gives you x=15/6

simplifying this fraction gives you x=5/2

Hope this helps.

63.8%

Step-by-step explanation:

We see that the total number of people sampled was 1000.

Out of those 1000 people, 638 of them wore glasses.

Taking the percent means diving the part by the whole (part/whole), so:

638/1000 = 63.8%

Thus, we predict that about 63.8% of Americans would wear glasses.

Hope this helps!