Hit the '2nd' button in the upper left corner first, then the cos button becomes cos^-1 (acos) , its 2nd function....
The 20km and 35 km LEGS form a right triangle with the distance to starting point being the hypotenuse
20^2 + 35^2 = d ^2 d = 40.31 km from starting point.
at a 29.74 degree angle from the start point.
x = nickels 5x = AMOUNT of nickels (cents)
100-x = dimes (10)(100-x) = AMOUNT of dimes (cents)
5x + 10(100-x) = 700 cents
5x + 1000 - 10x = 700 cents
-5x = -300 cents
x = 60 nickels 100 - x = 100 - 60 = 40 dimes
-5 - (-7) = is the same as = - 5 + 7 = 2
Hello ! With WHAT do you need help???
Whooooaaa ....you better check that answer!
x+1 =1 has an answer of only '0' I cannot put ANY other number in there!
if you wind up with soemthing like 3= 3 then x can be about any number....
Wow....before you call people 'stupid' YOU should learn how to spell 'infinite' LOL
Nope. Never. The result will always be MORE negative.....
I find an easy way to answer questions like this is by 'dimensional analysis'....
Dimensions mins/holes and mins
mins / (mins/holes) = holes (because 'mins' cancel out)
25 mins / (6 mins/12 holes) = 300/6 holes = 50 holes
- ( x - 3 ) - 4 ( x - 1 ) = 14
= -x+3 -4x + 4 = 14
= - 5x + 7 = 14
= -5x = 7
x = - 7/5
