Use a formula to write an equation for each problem, then solve it.A square plywood platform has a perimeter which is 9 times the length of a side, decreased by 15. Find the length of a side.
A. length of side = 8 units
B. length of side = 1 unit
C. length of side = 3 units
D. length of side = 5 units
Answer: C
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Provide an appropriate response.In a chemistry class, the following test scores were recorded for a student: 95, 92, 90, 89, 98, 94. Find the mean, median, and mode.
A. mean: 93, median: 93, mode: none B. mean: 93, median: 89, mode: 98 C. mean: 92, median: none, mode: none D. mean: 94, median: none, mode: 98
Solve. Write the answer as a mixed number in simplest form.Maria exercises for 2
hours every Saturday. She runs for 
of the time that she exercises. How much time does she spend running every Saturday?
A. 
hr
B. 
hr
C. 4
hr
D. 2
hr
Divide and, if possible, simplify. Assume all variables represent positive real numbers.
A. 2 
B. 10 
C. 2x 
D. 6 
Given matrix A, find the indicated minor or cofactor.Find the minor M13.A = 
A. 15 B. -8 C. -15 D. 9