1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aleksandrvk [35]
4 years ago
6

2. If y varies inversely as x and y = 3 when x = 5, find x when y = 2.5

Mathematics
1 answer:
4vir4ik [10]4 years ago
8 0

Answer:

Step-by-step explanation:

From the law of variation,

y <> 1/x, where <> is the constant of proportionality. Therefore

y = k/x where k is a constant

3 = k/5 and k = 15

To find x when y = 2.5(5/2)

Go back to the second equation

y = k/x

5/2 = 15/x

When you cross multiply

5x = 30.

Divide through by 5,

x = 6.

You might be interested in
70 - 5x = number of people waiting in line to buy tickets x minutes after a ticket booth opened is given by 70 - 5x. What does t
Snowcat [4.5K]

Answer:

The 70 represents the number of people waiting to by tickets at the exactly moment when the ticket booth is opened.

Step-by-step explanation:

The 70 represents the number of people waiting to by tickets at the exactly moment when the ticket booth is opened.

You can see this by setting the x value to 0, it is, in the precise moment when the booth opened (as x cant be negative, because there is no negative time, you could also think of 70 as the number of people waiting before the booth opens).

4 0
3 years ago
Round 66.3899872389 to the nearest thousandth
ddd [48]

Answer:

66.390

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is 0.6767 as a simplified fraction
vodka [1.7K]

Answer: 6767/10000

Step-by-step explanation:

Just simplify it by its nearest tenth

6 0
3 years ago
The odds of rolling a die and getting an even number is 50%. Write out the success set and the sample set to use the definition
Charra [1.4K]

Answer:

It gets more complicated with a six-sided die. In this case if you roll the die, there are 6 possible outcomes (1, 2, 3, 4, 5 or 6). Can you figure out what the theoretical probability for each number is? It is 1/6 or 0.17 (or 17 percent).

3 0
2 years ago
If a+b+c=0 then find the value of a^2+b^2+c^2/a^2-bc pls help me
VladimirAG [237]

a+b+c=0

[(a+b+c)^2=a^2+b^2+c^2+2ab+2ac+2bc]

[a^2+b^2+c^2+2ab+2ac+2bc=0]

[a^2+b^2+c^2=-(2ab+2ac+2bc)]

[a^2+b^2+c^2=-2(ab+ac+bc)] (i)

also

[a=-b-c]

[a^2=-ab-ac] (ii)

[-c=a+b]

[-bc=ab+b^2] (iii)

adding (ii) and (iii) ,we have

[a^2-bc=b^2-ac] (iv)

devide (i) by (iv)

[(a^2+b^2+c^2)/(a^2-bc)=(-2(ab+bc+ca))/(b^2-ac)]
8 0
3 years ago
Other questions:
  • Suppose that you randomly draw one card from a standard deck of 52 cards. after writing down which card was drawn, you place the
    12·1 answer
  • The capacity of a petrol tank is 80 litres. If it initially contains 5 litres and a petrol pump fills it at 3 litres per 10 seco
    14·1 answer
  • Which statement represents the expression 200 + (-200)?
    15·1 answer
  • Jason Aldeen bought a house for $275,000. He made a down payment of 15%. The interest rate is 4.2% for 15 years.
    10·1 answer
  • Joanna has a total of 7 rolls of coins worth $23. She has rolls of dimes worth $5 each, and
    12·1 answer
  • The formula a=6s^2 will calculate the surface area of a cube. suppose you have a cube that has a surface area of 216 square inch
    7·1 answer
  • 10.
    14·1 answer
  • Solve for the value of k
    12·2 answers
  • What is the slope of the line passing through the given points 4,2 and -2,1
    8·1 answer
  • Which equation represents this statement nine less than three times a number is 18
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!