If f(x) = 3× + 10× and g(x) = 5× - 3, find (f - g)(×)

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?