the math club bought 16 graphing calculators for $765 The TI-70 model cost $40 and the TI-83 model costs $65 write a system of equations that could be used to determine the number of TI-70 calculator, x and the number of Ti-83 Calculators, Y,That were purchasedHe has refused to pass other Laws for the accmmodation of lagre districts of people

here is the

mark brainliest pl

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

a

step-by-step explanation:

the denominator cannot be the same as one of the factors.

8 denominator times 2 denominator = 16

and 7 numerator time 11 = 77

77/16= 77/16 ( they cannot be further simplified)