i have 30 coins. some of them are dimes, and some of them are quarters. in total, i have $4.05. how many of each coin do i have?

23 dimes & 7 quarters

Step-by-step explanation:

You can create two equations:

Rearrange x + y = 30:

Substitute it into the x-value of the other equation & solve:

With the x-value, substitute it back to the original equation to find y-value:

Therefore, there are 23 dimes & 7 quarters.

1gm = 1000mg so 0.1gm = 1000mg

first, convert the weight to kg

160lb * 1kg/2.2lb = 72.7kg

next, the dose

72.7kg * 100mg/kg = 7270mg

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).