Q. What is the value of the expression below when z=2 ?10z+9Answer:
Substitute Value of z: Substitute the value of z into the expression.We are given z=2, so we substitute 2 for z in the expression 10z+9.Calculation: 10×2+9
Multiply 10 by 2: Multiply 10 by 2. We perform the multiplication part of the expression first, according to the order of operations (PEMDAS/BODMAS). Calculation: 10×2=20
Add 9 to Result: Add 9 to the result from Step 2.Now we add 9 to the result of the multiplication.Calculation: 20+9=29