Final answer:
To evaluate the expressions, -2h + 3at and 3(a + bc) + 4, we substitute the given values and simplify the expressions.
Step-by-step explanation:
To evaluate the expression -2h + 3at when a = 2, h = 7, and t = 3, we substitute the given values into the expression:
-2(7) + 3(2)(3)
Simplifying, we get:
-14 + 18
Which equals 4.
To evaluate the expression 3(a + bc) + 4 when a = 9, b = 4, and c = 5, we substitute the given values into the expression:
3(9 + 4(5)) + 4
Simplifying, we get:
3(9 + 20) + 4
3(29) + 4
Which equals 87 + 4, which equals 91.