Add the following fractions:
1 1 1 2 1
a. Ä + Ä c. Ä + Ä + ÄÄ
3 5 3 5 15
2 1
b. Ä + Ä
7 3
8 4
a. ÄÄ c. Ä
15 5
13
b. ÄÄ
21
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Solve by the method of elimination by substitution.2x - 2y = -103x + 3y = 27
A. x = -2, y = 7 B. x = 2, y = 7 C. x = -7, y = -5 D. Inconsistent
Solve the problem.Find two consecutive positive integers such that the square of the smaller integer added to seven times the larger integer is equal to 85.
A. -13, -12 B. No such integers exist. C. 6, 7 D. 13, 14
Solve.The area code for a phone number in a city can be either 813 or 218. The rest of the 7-digit phone number can be formed with the digits 0 through 9. How many phone numbers can the city have before it needs to have another area code?
A. 130,000 B. 20,000,000 C. 18,000 D. 1,000,000
Solve the system of equations by substitution.3x + y = 132x - 7y = 24
A. (5, 2) B. (-5, -2) C. (-5, 2) D. (5, -2)