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?
To estimate the value of each expression, you substitute the given value for the variable and then simplify the expression. Let's go through each question:
1. 7+3q: q = 7.6
To estimate this expression, substitute q = 7.6 into the expression:
7 + 3(7.6) = 7 + 22.8 = 29.8
So, your estimation of 29.8 is correct.
2. 2m^2 - 3m ; m = 1.6
To estimate this expression, substitute m = 1.6 into the expression:
2(1.6)^2 - 3(1.6) = 2(2.56) - 4.8 = 5.12 - 4.8 = 0.32
So, your estimation of 0.32 is correct.
3. x^2 + 7x - 19; x = 4.21
To estimate this expression, substitute x = 4.21 into the expression:
(4.21)^2 + 7(4.21) - 19 = 17.7641 + 29.47 - 19 = 28.2341
So, your estimation of 28.2 is correct.
Overall, your estimations are correct for all three expressions. Well done!