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How old will you be?

if the fixed costs are £300 a week and the variable costs per cup of coffee are 70p, the break-even point will be:

The break-even point will be reached when they sell:

300 / 0.70 =~429 cups of coffee!!.

A brackets à what do you mean?

What is -4(x + 2) < -( 6x - 12/3 ) i have no clue my calculator dosent even know

What is -4(x + 2) < -( 6x - 12/3 )

20%

Math only thank you and no spam as well

(16x+8)/2   ?    IS that what you mean?

= 1/2  (16x +8)

= 1/2 (16x) + 1/2 (8)

= 8x + 4

PEMDAS      ------->     http://www.purplemath.com/modules/orderops.htm

You have to do thing s in specific order to get consistent answers....otherwise different people would get different answers to the SAME question because they did things in different order.

John:   2 + 3 x 4 = 24   (correct !  Do multiplication first)

mark    2 + 3 x 4 = 20   (incorrect....must do mult first NOT addition)

But he travels a total of 130 m.

Sorry, I thought wrong.

If you are asking how you can change a log (that is in a different base than 10) into a log of base 10, you can use the change-of-base formula:

         log_base(number)  =  log₁₀(number) / log₁₀(base).

Example:  log₈(50)  =  log₁₀(50) / log₁₀(8)

Happy Birthday Rosala!

15 x 12 = 180 Months = 5478 days!     

When you get older, you will still CELEBRATE them, but not COUNT them!

'opposites attract'

D.

A couple of ways (and answers) to look at this

toatl distance travelled =  90 + 40 = 130 m

total time = 20 s       130/20 = 6.5 m/s  avg

If you are looking at how far away the car got from the starting point (using vectors)

90 - 40 = 50 meters from start   and it took 20 seconds     50/20 = 2.5 m/s avg

Sorry for b) i meant to find the gradient of the line perpendicular to AB

a car travels 90 meters due north in 15 seconds. then the car turns around and travels 40 meters due south in 5 seconds. what is the magnitude of the average velocity of the car during this 20 second interval

My analysis is different (although maybe not correct):

Since the car ended 50 meters due north of the starting point, the car has ended traveling 50 meters north in 20 seconds; thus, 50/20  =  2.5 m/s.

a car travels 90 meters due north in 15 seconds. then the car turns around and travels 40 meters due south in 5 seconds. what is the magnitude of the average velocity of the car during this 20 second interval

Solve for x:
6 x+50 = x^2+10

Subtract x^2+10 from both sides:
-x^2+6 x+40 = 0

The left hand side factors into a product with three terms:
-(x-10) (x+4) = 0

Multiply both sides by -1:
(x-10) (x+4) = 0

Split into two equations:
x-10 = 0 or x+4 = 0

Add 10 to both sides:
x = 10 or x+4 = 0

Subtract 4 from both sides:
Answer: |x = 10                     or                        x = -4

OH, ok. But why were they funny posts?

As of October 2014, 13,300,000,000,000 digits of pi were known (http://www.numberworld.org/y-cruncher/)

-61 – (83 – |-91|)

= -61 – (83 – 91)

= -61 - 83 + 91

-61 -83 + 91 = -53

period = 2pi/(2pi) = 1

They just said that Omi accidentally used 0.25 instead of 25 in here first substitution. :/

What do you mean ?

HI Miss Melody