Answer:
A
Step-by-step explanation:
We are given:
Recall the co-function identity:
Let θ = 7f + 4. So:
Substitute:
Remove the cosine:
Distribute:
Subtract:
Add 7f and 1 to both sides:
Therefore:
Total health care costs in the United States in 2003 were $2,000,000,000,000. Express this number in scientific notation.
1 answer:
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Answer:
See below.
Step-by-step explanation:
We know that and we want to prove that
.
Statements Reasons
1) Given
2) A) Vertical Angles Are Congruent
3) B) Substitution Property
4) C) Alternate Interior Angles Converse*
*We know that alternate interior angles are congruent when two parallel lines are cut by a transversal. So, the converse states that if the two alternate interior angles are congruent, the the two lines must be parallel.
Further Notes:
I'm not sure why they did more than necessary. Since , they are corresponding angles. Then by the Corresponding Angles Converse, p must be parallel to r.