If a=4, b=5, and 2(ab +bc + ca)=202, find the value of c

c = 9

Step-by-step explanation:

First we need to substitute in our known values:

2 ((4X5) + 5c + 4c) = 202

Next we can do the inner multiplication and combine our like terms:

2( 20 + 9c) = 202

Now we distribute the 2:

40 + 18c = 202

Subtract 40 from both sides:

18c = 162

Lastly, divide both sides by 18 to get:

c = 9

Check our work:

2 ((4X5) + (5X9) + (9X4)) = 202

2(20 + 45 + 36 ) = 202

2(101) = 202

202 = 202

it's 100

step-by-step explanation:

22, 28, 34, 40, 46

b)   f(n) = 6n + 16

  n = what is the number of the row ( 22 would be row 1) so if we replaced n with 1, we would get 22

c)   the  14th  row will have 100 seats

(1)   (2)   (3)   (4)   (5)   (6)   (7)   (8)   (9)   (10) (11) (12) (13) (14)

22 | 28 | 34 | 40 | 46 | 52 | 58 | 64 | 70 | 76 | 82 | 88 | 94 | 100

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