Discuss collecting weather data in the upper atmosphere. Upper-level weather data is collected by a , which is a series of sensors carried by a . Sensors that measure , and are carried. Measurements are sent back by . is very important when measuring data because it helps meteorologists determine wind speed and .

the answer is "focused on"

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simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13

it met the katy line in vinita.

iv. it traveled through cherokee and quapaw tribal lands.