Exercise 1- 4 Exam - BARTON COLLEGE PRACTICE PLACEMENT TEST

  Exam - BARTON COLLEGE PRACTICE PLACEMENT TEST

 Execise 1

Simplify:  

a) 4
b) ‐4
c) 12
d) ‐10.5

 Solution

 The order of mathematical action are:

Power & Roots
Multiplication & Division
Addition $ Substration

 So we solve the according the following rule:

 The correct answer is c.

 

Execise 2

Simplify: (2a – 4) + 2(a – 5) – 3(a+1)

a) 7a – 11
b) a – 17
c) a – 11
d) 7a ‐17

Solution

(2a – 4) + 2(a – 5) – 3(a+1)=

2a - 4 + 2a - 10 - 3a - 3 = 

2a + 2a - 3a -4 -10 -3 = 

a -17

The correct answer is b.

 Execise 3

Evaluate the expression:   , when a = 2 and b = 5

a) ‐14
b) 1
c) 66
d) 81

Solution

 we substitute a = 2 , b = 5 at the expression : 

 

 The correct answer is b.

 

Execise 4
 

Firefighters use the formula S = 0.5P + 26 to compute the horizontal range S in feet of water from a particular hose, where P is the nozzle pressure in pounds. Find the horizontal range if pressure is 90 lb.

a) 44 feet
b) 450 feet
c) 19 feet
d) 71 feet

Solution

We substitute P = 90 lb at the formula S = 0.5P + 26.

S = 0.5*90 + 26 = 45 + 26 = 71

The correct answer is d.