1. Twenty-one is equal to the sum of two x's plus nine and four tenths. What is x?

x = 5.8.

Step-by-step explanation:

2x + 9.4 = 21

2x = 21 - 9.4 = 11.6

x = 11.6 / 2

x = 5.8.

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.