Use elimination to determine whether the system of equations has no solutions, one solution, or infinitely many solutions.2x + 4y = 108x + 16y = 40
A. Infinitely many
B. One
C. No solutions
Answer: A
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Add and simplify.
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Solve the problem.Two people start jogging at the same time. One jogs south at 3 miles per hour and the other jogs west at 2 miles per hour. After how long are they 24 miles apart? Round your answer to the nearest tenth.
A. 18.8 hr B. 6.7 hr C. 10.7 hr D. 2.2 hr
Write the number in scientific notation.0.0000000618018
A. 6.18018 × 10-9 B. 6.18018 × 10-7 C. 6.18018 × 108 D. 6.18018 × 10-8
Solve.A young married couple had a combined annual income of $80,000. If the wife made $4000 more than the husband, graph the system to find the two incomes.
A. Wife's income: $38,000 Husband's income: $42,000 B. Wife's income: $42,000 Husband's income: $38,000 C. Wife's income: $72,000 Husband's income: $8000 D. Wife's income: $8000 Husband's income: $72,000