COLEGIO SAN PATRICIOMath Practice for 4th Period Exam

School Year 2009 – 2010

Name _____________________________________Teacher____________________________Date___________________________________________List No.__________7th_____________

I.- Simplify the expression:

1) 24 – 6x + 42 = ________ 2) 12x + (6 – x) 4=__________ 3) -9x(6x +18)=__________

4) (4x-5)(6) +x=________ 5) -4(x – 3)=__________ 6)3x + 2x² - 9 + x + 7 = ______________

II.- Solve the equation:

7) 60x = 30x + 60 8) 25b = 135 + 15 9) -3 + n = 0 10) y - 80 = 80 11) x = 4 + 5 6

11) 6x + 4 = 2x + 16 12) 3y – 7 = 4²- 11 13) 8x + 4 = 7x + 11 14)72 + 8 = x + 68 8

III.- Problem Soving.-

15. The spelling and grammar test was taken by 217 students. Thirty-seven failed. What percent passed? a). 13 b). 17 c). 83 d). 87 

 

16. Last year, the school spent $8,300 for office equipment. This year, it will spend 5 percent less. How much will it spend this year.  a). $7,885 b). $7,737 c). $6,640 d). $6,690

17.- There are 30 students in 7th H, 14 of them play football. What percent of the students in 7th H play football?

18.- Yesterday I bought a CD that was on sale at $30. It was 25% its original price. What was its original price?

19.- In a concert 75% of the attendants were on time. If there were a total of 560 people. How many were on time? How many were late?

20.- How many outcomes would you have if you throw three coins to the air?

IV.- GEOMETRY.- Draw and find the area of: 21- A triangle which measures are 5cm, 9cm and an angle of 50°. Remember the steps: 1.- trace a line segment, (any of the 2) 2.- measure the angle, 3.- trace the other line segment, 4.- trace the third line segment to finish the triangle. 5.- measure the height to find the area.

22- A rhombus which diagonals measure 6cm and 4cm.

23- Can you trace a triangle which measure are 4cm, 3cm 5cm. If it is possible, Trace it and find the area.

24.- Find the area of a circle that has a diameter of 12 cm:

25.- How much would I need to cover the football field with grass if it measures 20m length and 12m width?

26. Make a pie graph for each set of data below. Label sections by coloring each section of the graph and creating a key. Give each graph a title.

 Favorite Web Site

Votes Percent Degrees

AOL (Homepage)

4

Lycos 3

MSN 7

Napster 13

Yahoo 8

Total 35

 

 

 

V.- EXPONENTS 27.- 3²=_____ 28.- (y + 3)²= _______, y= 2 29.- x² + 8=_____, x=2 30.- x³ =____, x=4

31. En una urna hay 6 bolitas blancas, 3 bolitas amarillas y una bolita roja. Extraemos al azar una bolita

y nos fijamos solamente en su color. ¿Cuál es la probabilidad de que la bolita extraída sea de color

blanco?

a. 6/10 b. 3/10 c. 4/10 d. 1/10

32. ¿Cuál es la probabilidad de obtener un número mayor que 2 al lanzar un dado?

a. 4/6 b. 1/6 c. 2/6 d. 3/6