Elsa's grandmother paid her x dollars a week to mow the lawn during the summer. elsa decided to save some of her money and spend the rest. for the first 4 weeks, elsa put $10 per week into savings. for the next 8 weeks, she put $15 per week into savings.
pick all the expressions that represent how much money elsa spent.

4(x–10)+8(x–15)

(4x+8x)–(40+120)

12x–160

(4x–40)+(8x–120)

Amount of money Elsa spent= amount of money given by grandmother,x - amount of money saved.

Hence for the first four weeks, amount spent= 4(x-10) as she saved 10 per week for 4 weeks.

For the next eight weeks, amount spent= 8(x-15) as she saved 15 per week for 8 weeks.

Thus the answer would be the first option.

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: