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Solve the following system of equations using substitution: y = 2x + 3 and 3x - y = 5. What is the value of x?

A. 1
Posted in:  Linear Equations -  Algebra -  Mathematics

A practical problem states that a car travels 60 km/h and a truck travels 40 km/h. If they start from the same point and the car is 30 minutes ahead, how far will they be from the starting point when they meet?

B. 90 KM
Posted in:  Linear Equations -  Algebra -  Mathematics

What is the least common multiple (LCM) of 12 and 15?

A. 30
Posted in:  Numbers -  Arithmetic -  Mathematics

If x = 3 and y = 4, what is the value of x^2 + y^2?

A. 25
Posted in:  Numbers -  Arithmetic -  Mathematics

What is the sum of the first 10 prime numbers?

A. 129
Posted in:  Numbers -  Arithmetic -  Mathematics