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37 degrees

Step-by-step explanation:

Vertical angles are congruent --> equal measures

m<1 = m<2

3x+7 = 7x - 33

4x = 40

x = 10

7*10 - 33 = 70-33 = 37 degrees

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

students group

step-by-step explanation:

a person who   joins a party or a seminar can explain his feelings about that particular occasion better more than anyone else.

as bella managed a show for the students in the school and invited students to watch that show

hence

students group will be the best group to survey to find this information