Answer:
10x - 15
Step-by-step explanation:
let Emily's be x hrs
Abbey = 3x-5 hrs
Nathan = 2 * Abbey's time= 2(3x-5)
= 6x-10 hrs
Expression= x + 3x-5 + 6x-10 = 10x - 15 hrs
Therefore, 10x - 15 is the EXPRESSION THAT DENOTES THE TOTAL NUMBER OF HOURS SPENT FOR DOING HOMEWORK COLLECTIVELY.
Answer: 215
Step-by-step explanation:
A rate is a ratio where time is usually involved such as 60 km/ 1 hour.
So, the answer is true.
Can u specify more pleasee
Y = 10x + 400
y = 30x + 300
10x + 400 = 30x + 300
20x = 100
x = 5 months(answer to first question)
y = 10(5) + 400
y = 450
After 5 months, Tina will save $450 with either option.