Mathematics, 11.10.2021 17:00 tejasheree
Question 9 of 10
In order to solve the following system of equations by subtraction, which of
the following could you do before subtracting the equations so that one
variable will be eliminated when you subtract them?
4x – 2y=7
3x – 3y=15
A. Multiply the top equation by-3 and the bottom equation by 2.
B. Multiply the top equation by 15 and the bottom equation by 7.
C. Multiply the top equation by 3 and the bottom equation by 4.
D. Multiply the top equation by 1/3.
Answers: 3
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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?
Answers: 2
Question 9 of 10
In order to solve the following system of equations by subtraction, which of
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