Matematicas estudiar!!!!

10.The furniture in a doll house was designed on a 1:30 scale of the original furniture. If the original bed measuring 5 feet by 8 feet, what are the measurement of the bed in the dollhouse?

0.267 * 0.2

Which of the following is a good estimate of the length of a standard bed pillow?

0.5 m

Student to faculty ratio at a college is 43:2, there would be 281. Which of the following is the # of faculty members?

134

Which of the following is a number of 3/4 inch strips of caulk it will take to completely cover a length of 10 1/2 inch?

14

A person's high is 5 feet, 10 inches. Which of the following is the appropriate estimate of this person hight in cm?

178

A gumball machine contains red,orange, yellow, green, and blue. 20 % of the ball gums are red, 30% are orange, 5% are yellow, 10% are green, and the rest are blue. if there are a total of 120 gumballs, how many more blue are there than yellow gumballs?

36

Seven more than twice a number is equal to twenty-one

7 + 2x = 21

Convertir Decimal a %

Multiplicar el decimal por 100 Ex. 0.75 por 100= 75

The number of bicycles (x) in a shop is 4 more than 3 times the number of snowmobiles (y). Which of the following equations symbolically represents the number of bicycles in terms of the number of snowmobiles?

X + 4 = 3 y

(x^2 +4x+4)-(x^2 -6x +9) Simplify the expression above

10x - 5

2.If a pizza has a perimeter of 16" what is the area?

20.30

The total weight of the 3 students is X, if the weight of the 1st, and 2nd student is 20%, 40% respectively. What is the ratio of the weights of the three students?

20:40:40 = 1:2:2

A worker is paid 2,350 monthly and has $468 withheld from each monthly paycheck. Which of the following is her annual salary?

22,584

The hypotenuse (side C) of a triangle is 13 inches long. Whic of the following pair measurements could be correct for the lengths of the other 2 sides of the triangle ( a^2 + b^2 = c^2)

5 inches, 12 inches

A glass that holds 0.5 liters will hold how many in milliliters?

500 milliliters

If the pediatric unit of a hospital has 165 beds, how many rooms are there if each room holds 3 beds?

55

Which of the following is the weight of the cargo in a truck if 1/3 of the cargo weighs 516 pounds (lb)? a.688 Ib b. 1,543 Ib c. 172 Ib d. 1,302 Ib

B. 1543 lb

The top of a dresser is 3 ¾ feet from an 8-foot ceiling. Which of the following is the height of the dresser in feet? A. 4 ¾ B. 4 ¼ C. 5 ¾ D. 5 ¼

B. 4 1/4

A rectangle has a perimeter of 24 units. If the width is 4 units, which of the following is the length? A. 16 units B. 8 units C. 10 units D. 6 units

B. 8 units

An employee at a marketing firm makes $2686.00 a month. Of that amount, $517.00 is deducted for insurance, $299.33 is withheld for federal taxes, $156.69 goes to social security, and $99.77 is withheld for state taxes. Which of the following is the employee's monthly take home pay? a. $1,072.99 b. $3658.99 c. 2068.80 d. 1513.01

D. 1513.01????

6.A student uses approximately 40 to 45 gallons of gasoline per month. The cost of the gasoline varies between $2.96 and $3.61 per gallon. Which of the following is a reasonable estimate of the student's weekly gasoline expense? A. $50 B. $45 C. $15 D. $30

D. 30

4.A house painter can finish a house in 6 hours. His partner can finish the same house in 12 hours. Which of the following is the number of hours it would take them to finish painting the house if they had worked together? A. 9 hours B. 6 hours C. 3 hours D. 4 hours

D. 4 hrs

Convertir % a decimal

Dividir el % entre 100 Ex. 42.7 entre 100= 0.427

Recordar: siempre redondear los numeros en el examen cuando dice estimate!!!!! Ex. high: 22.1—>>> 20. length: 98—>> 100 width: 54->> 59

Recordar: positive correlation means that as one variable increase, the other one does as well

1.A store sells two kinds of candles, scented and unscented. the scented candles burn 1/12 inches in 20 minutes. the unscented candles burn 1/16 inches in 30 minutes. Which type of candle burns in 1 hour and what is its burn rate?

Scented candle burn in 1 hr and its burn rate is 1/4

Which of the following correctly represents the phrase " five less than a number is greater than 20?

x-5>20