a machine uses fuel which consist of petrol and engine oil in the ratio 20:1 respectively. how many litres of petrol is mixed with 0.25 litres of engine oil?

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given