Question

Use the drawing tool(s) to form the correct answer on the provided number line.

Evaluate the following expression when a=5 and b= 1. Then, plot the resulting value on the provided number line.
12+ [2
(4a²)] + 7 + b

Answer 1

-1

Explanation:

this is really simple.

a = 5 ? great, then we put that 5 into every place, where there is "a" on the expression.

b = 1 ? then we put 1 into every place , where there is "b" in the expression.

that is what variables are for : placeholders for actual values.

and now we just calculate.

remember the priorities of operations :

1. brackets, functions

2. exponents

3. multiplications, divisions

4. additions, subtractions

so

12 + (2 - (4×a²))÷7 + b = 12 + (2 - (4×5²))÷7 + 1 =

= 12 + (2 - (4×25))÷7 + 1 =

= 12 + (2 - 100)÷7 + 1 =

= 12 + -98÷7 + 1 =

= 12 - 14 + 1 = -2 + 1 = -1

so, the point has to be made at -1.