danne9000

50 holes in 25 minutes is the answer. 

Cheers

First find the number of holes per drilled per minute which is 12/6=2
So 2 holes per minute times 25 minutes gives us 50 holes. 

Cheers

First find the number of holes per drilled per minute which is 12/6=2
So 2 holes per minute times 25 minutes gives up 50 holes. 

Cheers

The last ratio is correct 1:4, for every 1 mile A, B travels 4 times as long

Since 1 us dollar is 1.4167 NYZ then 1 nyz is 1/1.4167 or 0.7USD

So it follows that 900 NYZ = 900*0.7=630 USD.

Note that I've rounded to one decimal point so there's a slight deviation the exact rate is 0.7058... and exact USD amount 635.2791.

Cheers

His chance is 9/22 or 40,91%. Simply write the equation as follows and solve for x.

x*0.4091=50

x=50/0.4091

x=122

Here you have sneakers (x), socks (y) and shirt (z). Each of these can be expressed as a function of the sneakers. For example the shirt (z) is 0.4 times the price (40%) of the sneakers, and so on. Then we have the following:
z=0.4x

y=0.2z

If y is 0.2z then y can also be writen as 0.2*0.4x=0.08x

x+0.4x+0.08x=118.4

1.48x=118.4

x=118.4/1.48

x=80

z=0.4*80

y=0.2(0.4*80) 

Sneakers cost 80, shirt costs 32 and the socks costs 6.4

Cheers.

Since know the number of tickets is 84, the number of children's tickets can expressed as the total number of tickets minus the adult tickets or 84-x where x is the number of adult tickets. Then we have the following equation:
 

105*x+60(84-x)=7155

Factor out the equation to get

105x+60*84-60x=7155

Next up we get x alone on the left side of the equation and get

105x-60x=7155-60*84

45x=7155-5040

45x=2115

x=2115/45

x=47

y=84-47

y=37

You can check this by putting the values into the equation: 47*105+60*37

Cheers

To calculate this you'll just need to multiply each of the exchange rates. So bunnies are worth 0.75 chickens (3/4), chickens are worth 0.4 pigs and pigs are worth 0.67 donkeys. 

Multiply all of these > 0.75*0.4*0.67=0.2

Since we now know a bunniesis worth 0.2 donkeys we then need (1/0.2=5) 5 bunnies to trade for a donkey.

Please type if you need more clarification.