SAT Practice 1

 $If\ \ \frac{x-1}{3}=k\ and\ k=3\ what\ is\ the\ value\ of\ x?$  

• 2

• 4

• 9

• 10

For  $i=\sqrt{-1}$  , what is the sum  $\left(7+3i\right)+\left(-8+9i\right)$  ?

•  $-1+12i$  

•  $-1-6i$  

•   $15+12i$  

•  $15-6i$  

On Saturday afternoon, Armand sent m text messages each hour for 5 hours, and Tyrone sent p text messages each hour for 4 hours. Which of the following represents the total number of messages sent by Armand and Tyrone on Saturday afternoon?

•  $9mp$  

•  $20mp$  

•   $5m+4p$  

•  $4m+5p$  

Kathy is a repair technician for a phone company. Each week, she receives a batch of phones that need repairs. The number of phones that she has left to fix at the end of each day can be estimated with the equation P  = 108 − 23d , where P is the number of phones left and d is the number of days she has worked that week. What is the meaning of the value 108 in this equation?

• Kathy will complete the repairs within 108 days.

• Kathy starts each week with 108 phones to fix.

•  Kathy repairs phones at a rate of 108 per hour.

• Kathy repairs phones at a rate of 108 per day.

 $\left(x^2y-3y^2+5xy^2\right)-\left(-x^2y+3xy^2-3y^2\right)$  
Which of the following is equivalent to the expression above?

•  $4x^2y^2$  

•  $8xy^2−6y^2$  

•  $2x^2y+2xy^2$   

•  $2x^2y+8xy^2−6y^2$  

 $h=3a+28.6$  
A pediatrician uses the model above to estimate the height h of a boy, in inches, in terms of the boy’s age a, in years, between the ages of 2 and 5. Based on the model, what is the estimated increase, in inches, of a boy’s height each year?

• 3

• 5.7

• 9.5

• 14.3