Answer:
and 
Step-by-step explanation:
If a number 'x' is a perfect square, then 
is rational.
25, 36 and 81 are perfect squares, but 54 and 120 aren't, so the irrational values are and
240÷6=40 so the answer would be "The train is traveling 40 miles per hour."
Your answer is 21 for this one.
Answer:
Step-by-step explanation:
Part A - Where did Phillip make a mistake? Justify your answer using complete sentences.
Use order of operation (PEMDAS)
He should multiply 8 x 4 first
Part B - Solve the expression correctly in the space below.
(5 x 9) - 8 x 4
= 45 - 32
= 13
Part C - Use the same rules of order of operations to solve the expression (8-4) +9 x 3. Explain your steps as you solve it.
(8-4) + 9 x 3
Step 1: 4 + 9 x 3 (Subtract in the parenthesis first)
Step 2: 4 + 27 (Multiply 9 x 3)
Step 3: 31 (Add)
