Tutor profile: Kayla R.
2a + a = 18. Solve for a
2a + a = 18. What is a? Combine like terms so that 2a + a = 3a 3a = 18. Then we will need to divide 3 from each side. 3/3 = 1, so that leaves the variable a by itself. Then we will need to divide 18 and 3, which equals to 6. a = 6.
Subject: Basic Math
I have 20 dollars to spend at the super market. I want to buy a gallon of milk for 5 dollars, a loaf of bread for 3 dollars, and a can of soup for 1 dollar. How much will my total be? Then, calculate how much change I will receive from the cashier after my purchase.
If I have 20 dollars to spend, I will need to carefully plan out my purchases at the super market in order no to overspend. First, I will need to add up the total amount of the three items that I need to buy: gallon of milk = $5, loaf of bread =$3, and a can of soup = $1. 5 + 3 + 1 = $9. $9 dollars will be my total amount for the three items that I need to purchase. Next I will calculate how much change I will receive in return for the purchased items. I know I have $20, so I need to subtract the $9 total amount from the $20 I have to make this purchase. $20-$9 = $11. I have $11 remaining from my change.
Evaluate 5x + 5y, when x = 3 and y = 4
5x + 5y 5(3) + 5(4) 15 + 20 Answer: 35
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