Explain how you can use mental math to perform the following addition

A number divided by 40 has a quotient of 6 with a remainder of 16

P = $500 R = 8% T = 3 months (3/12)

aley is at the store buying some supplies for an art project. She decides to buy some colored pencils for $3.95 and a drawing tablet. The total cost of the supplies before sales tax is $6.94. What is the cost of the drawing tablet? $10.89 $2.99 $1.

How many solutions does this system have? 2x + y = 3 6x = 9 - 3y

15 unknown 11 unknown 3 unknown = 7 find the sign

What is the sale price of $59 with a 10% discount?

Could 1 2. 2 cm, 6. 0 cm, 12.2 cm, 6.0 cm, and 4. 2 cm 4.2 cm be the side lengths of a triangle?

What percent of 18 is 4?

Which pair of complex factors results in a real-number product? a. 15 (-15i) b. 3i (1-3i) c. (8 + 20i) (-8 - 20i) d. (4+7i) (4-7i)

3 is an element of the rational number (True or False)