Question

can you check:
i need to estimate the value of each expression:
7+3q: q = 7.6
i got: 29.8 estimated to : 30

2m^2 - 3m ; m = 1.6
i got: 0.32 estimate to : .3 is that right?

x^2 + 7x - 19; x = 4.21
i got: 28.1941 estimate to: 28.2 is that right?