How to find a and b? (pascal's triangle)

The two 5005s tell us we're in the middle of Pascal's triangle, which has bilateral symmetry.

So we can add the a and b labels to two other points by the symmetry as shown.

The two equations we can write are then

5005 + a = b

a + a = 12870

a = 12870/2 = 6435

b = 5005 + 6535 = 11540

a=6435, b=11540

Check:

Those are right, they happen to be

idk

step-by-step explanation:

use that smart brain

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x