Let x represent the amount Betty invested at 15%. The (2x+237) is the amount Betty has invested at 13%. Her total earnings are ...
x*0.15 + (2x+237)*0.13 = 1688.03
0.41x + 30.81 = 1688.03
x = (1688.03 -30.81)/0.41 = 4042.00
Betty has $4042.00 invested at 15%.
Betty has $237 +2*4042 = $8321.00 invested at 13%.
Answer:
8)449.1 9)349.3
Step-by-step explanation:
8.499+10/100*499=499+0.1*499=499+49.9=548.9
9.499-30/100*499=499-0.3*499=499-149.7=349.3
Answer:
21. Line b.
22. Line a.
Step-by-step explanation:
Line b is the most steep because it goes up 5, the rest goes up only 1 and 3
Line a is the least steep because it only goes up 1, while the rest go up more
20 is after the base cost
400 text messages can be sent without exceeding the limit.
Answer:
Step-by-step explanation:
17 units