How many solutions does g(x)=0 have?

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"