Answer:
250°
Step-by-step explanation:
We know that a circle has a total of 360°.
Now we know that ∠ROW is 110° and that Arc RAW has the same End points as ∠ROW.
We can safely assume that arc RAW will be the difference of ∠ROW and 360°.
So we then get:
360° - 110° = 250°
This means that Arc RAW will be 250°
They would be identical so it would be 114
<h3>
Answer:</h3>
- 32 kg of 30% copper
- 48 kg of 55% copper
<h3>
Step-by-step explanation:</h3>
Let x represent the mass of 55% copper alloy that is to be used in the mix. Then 80-x is the mass of 30% copper alloy to be used. The total amount of copper in the mix is then ...
... 0.55x + 0.30(80-x) = 0.45·80
... 0.25x = 12 . . . . . . simplify, subtract 24
... x = 48 . . . . . . . . . divide by the coefficient of x
... 80-x = 32 . . . . . . the mass of 30% copper alloy required
The metalworker should combine 32 kg of 30% copper alloy with 48 kg of 55% copper alloy to make 80 kg of 45% copper alloy.
