The speed of boat is 11 km/h in still water and speed of current is 7 km/h.
Step-by-step explanation:
Combined speed of boat and current while going down = 18 km/h
Combined speed while coming up = 4 km/h
Let,
Speed of boat = x
Speed of current = y
As boat and current were in same direction while going down,
x+y = 18 Eqn 1
We will subtract the speed of current while coming up because both the boat and current will be in opposite directions.
x-y = 4 Eqn 2
Adding Eqn 1 and Eqn 2
Dividing both sides by 2
Putting x=11 in Eqn 1
The speed of boat is 11 km/h in still water and speed of current is 7 km/h.
Keywords: linear equation, speed
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Answer: B, $4.41 per shirt
Step-by-step explanation:
To figure this out you want to first take the 200 shirts and multiply them by the cost of $2.80. This gives you a total of $560, without tax. The tax is 5%, so you want to take 560 and multiply it by .05 to find the amount of tax. This leaves you with $28 of taxes. Add that onto the already cost of $560, and it gives you a grand total of $588. She wants to sell the shirts with a 150% markup, so all you do is first find what Michelle really paid for each shirt with tax. Take the total cost of 588 and divide it by the number of total shirts which is 200. 588/200=$2.94 per shirt that Michelle paid. Times that by 1.5% and you get $4.41 per shirt that Michelle is selling.
Answer:
j = -5.1
Step-by-step explanation:
not sure if this is the answer u wanted, but hope this helps!
Has to be the first one because Yk how they do it so yea
Answer:
Option 3: 300 phones
Step-by-step explanation:
Given
Phone produces each day: 1000
Number of phones that were checked = 30
Defective phones = 9
So the probability of defective phones will be calculated by dividing the number of defective phones by total number of phones checked.
So, the probability of defective phones
= 9/30
= 0.3 or 30%
So, from 1000 phones the defective phones will be:
1000*0.3
= 300 Phones ..