Sam claims that cos X = sin Y if X and Y are congruent angles. Is Sam correct? A Yes, Sam is correct.
B. O No, cos X = sin Y if X and Y are corresponding angles.
C
No, cos X = sin Y if X and Y are complementary angles.
D
No, cos X = sin Y if X and Y are supplementary angles.

3x + 4y = 5 x- 3y = -7 solve by substitution

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details

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?