A plane traveled 4030 miles with the wind in 6.5 hours and 3120 miles against the wind in the same amount of time.

Find the speed of the plane in still air and the speed of the wind.

I don't know how to do the question

The mean lifetime of a certain type of lightbulb produced by a manufacturing company is 200 months with a standard deviation of 30 months. Such a lightbulb will be guaranteed for 150 months by the... more

10/05/17

i have to find the diiference qoutient for f(x)= -x^3 = f(a+h)-f(a)/h

f(x)=-x^3=f(a+h)-f(a)/h

10/05/17

Jordan adds 100 points to his dance game score to find Edgar's score. Edgar's score is 1,015. What is Jordan's dance game score?

Jordan adds 100 points to his dance game score to find Edgar's score. Edgar's score is 1,015. What is Jordan's dance game score?

Solve 9(9^1/x)-14(15^1/x)+5(25^1/x) = 0, leaving answer in 3 significant figures

9(91/x)-14(151/x)+5(251/x)=0 find x. 

Probability help

Americans can be quite suspicious, especially when it comes to governmentconspiracies. On the question of whether the U.S. Air Force has withheld proof of theexistence of intelligent life on other... more

10/04/17

Tell why each statement is true.

Tell why each statement is true. <1≅<4

10/04/17

Hi! I can't prove that sq rt of (2 + sq rt of (2 + 2 cos x)) = 2sin(x/4). Thank you!

Pls help! Oh, x is 270 degrees < x < 360 degrees

what are the equations to set up this problem?

The price of item A is 20% less than the price of the item B. If it costs $45 for both items A and B, find the price of each item.

Ron earns $4 per hour on Saturdays and $4 per hour on Sundays. He worked 17 hours one weekend and earn $76. How many hours did you work on Sundays?

My teacher says we can only use one variable for this answer, and I would only like help in finding the equation/formula

10/04/17

3two 5 time 3/4

i need help in math doung rational number 3 and two five time three fourth

toothpicks and tile math

she has arranged 10 tiles as shown. she wants to rearrange them so that the number of toothpicks remains the same. Draw one possible arrangement of the tiles

10/04/17

Is it proportional or not

The total cost (t) after 8percent sales tax is added to an items price(p):1:08p=t

I'm not understanding how to solve this. How do I do it?

a rectangular garden is made using a wall as one side of the rectangle. what are the dimensions if we have 16 ft of fencing and the area is 30 square feet?

Jasmine bought 7 yards of fabric. The total cost was $45.43. What was the average cost per yard of the fabric she bought?

Jasmine bought 7 yards of fabric. The total cost was $45.43. What was the average cost per yard of the fabric she bought?

a go-kart top speed is 607200 feet per hour. what is the speed per hour

Plz answer. asap

Find the difference of 8 yard 10 inches and 1 yard 10 inches

How to subtract  with different units  

10/04/17

-2y+4=6x+8 with (n,-4) (2,-8) they are perpindicular. Find the value of N?

 Trying to figure out what n is? I know to change the equation to slope form but what next?

10/04/17

if there are 25 students in a class and 8 are girls what is the ratio of boys to girls

25 students,8 students are girls 

How do you solve cos(cos^-1(x)+sin^-1(x))?

Could you please show me your steps? Thank you!

10/04/17

Is the product of a fraction less than 1 and a whole number greater than or less than the whole number?

This is a math question that i need help with.

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