Answer:
7.5
Step-by-step explanation:
Given;
- Bert earns $35,000 gross annual salary
- Any amounts earned up to $20,000 are taxed at x%
- Any amounts earned beyond $20,000 are taxed at 20%
- Bert pays $4,500 per annum in income tax
To find x
Amount earned beyond $20,000
= $35,000 - $20,000
= $15,000
That is the amount to be taxed at 20%
Therefore,
x% × 20000 + 20% × 15000 = 4500
200x + 3000 = 4500
200x = 4500 - 3000
200x = 1500
x = 1500/200
x = 7.5
1) Let's first find how many calories a runner burns on 1 km: R=120/1.6= 75 (calories/km)
2) On 5 km he will burn: Calories=5*R=5*75= 375 (calories)
______
375 calories he would burn on 5 km.
Answer:
a). 18 minutes
b). 8.4 miles
Step-by-step explanation:
a). Let Luis meet Kristina after the time = h hours
So the distance traveled by Luis in h hours = Speed × time
= 8×h
= 8h miles
If Kristin started after 45 minutes of 
hours then the distance traveled by her
= Speed × time
= 
miles
Since after h hours distances traveled by Luis and Kristin are same so,
28h - 8h = 
20h = 21
h = 1.05 hours
So the time taken by Kristin = (h - 0.75)
= 1.05 - 0.75
= 0.30 hours ≈ 18 minutes
b). Distance traveled by Luis before Kristin catches Luis = 8×1.05
= 8.4 miles
4 + 3/5 = 23/5 and
2 + 1/3 = 7/3 get a common denominator = 15 ....so....
23/5 = 69/15 and
7/3 = 35/15
So
69/15 - 35/15 =
34/15
