Please help meh The law of cosines for Triangle RST can be set up as 52 = 72 + 32 – 2(7)(3)cos(S). What could be true about Triangle RST?

Law of cosines: a2 = b2 + c2 – 2bccos(A)

r = 5 and t = 7

r = 3 and t = 3

s = 7 and t = 5

s = 5 and t = 3

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18