Translate the expression and simplify: three times the difference of a number and 6 decreased by twice the sum of the number and 1.
x - 20
20
Simplify the expression.
3k² - 11k - 7
15
Simplify then factor.
6(5a - 3b)
20
Everything is on sale for 20% off. You are going to purchase a necklace and pair of sunglasses. If the cost for the a necklace is n dollars and the sunglasses are $40, write an expression that can be used to determine the sale price.
.8(n + 40) or 4/5(n + 40) or 4/5n + 32 or .8n + 32
20
21 + 11s or 11s + 21
20
18x + 12
20
Juliet has 3 more than double the number of contacts in her phone than Lia has. Tanvi has 20 less contacts in her phone than Juliet. Write a simplified expression for the total number of contacts the three girls have altogether.
