BLITZ W3: 2019 STAAR Questions

What is the positive solution to this equaiton? $4x^2+12x=135$  

• 4

• 4.5

• -4

• -4.5

Which expression is equivalent to $\left(10+7r-r^2\right)+\left(-6r^{2\ }-18+5r\right)$   

•  $-7r^2+2r+8$  

•  $7r^2+12r+8$  

•  $-7r^2+12r-8$  

•  $7r^2+2r-8$  

The graph of a linear function is shown on the grid.

Which equation is best represented by this graph?

• $y+2=\frac{7}{5}\left(x+7\right)$

• $y-2=\frac{7}{5}\left(x-7\right)$

• $y+2=\frac{5}{7}\left(x+7\right)$

• $y-2=\frac{5}{7}\left(x-7\right)$

The graph of a quadratic function is shown on the grid.

Which function is best represented by this graph?

• $h\left(x\right)=x^2-3x-9$

• $h\left(x\right)=x^2+3x-9$

• $h\left(x\right)=x^2-6x$

• $h\left(x\right)=x^2+6x$

Which expression is equivalent to $24x^2-22x+5$   

•  $\left(12x+5\right)\left(2x+1\right)$  

•  $\left(8x-5\right)\left(3x-1\right)$  

•  $\left(12x-5\right)\left(2x-1\right)$  

•  $\left(8x+5\right)\left(3x+1\right)$  

What is the value of the y-intercept of the graph of $h\left(x\right)=29\left(5.2\right)^x$   

• 29

• 5.2

• 0

The table shows the amount of pet food in cups remaining in an automatic feeder as a function of the number of meals the feeder has dispensed.

Based on the table, which function models this situation?

• $f\left(n\right)=-3n+24$

• $f\left(n\right)=-\frac{1}{3}n+16$

• $f\left(x\right)=-3n+64$

• $f\left(n\right)=-\frac{1}{3}n+8$

Which expression is equivalent to $210d^2-63d$   ?

•  $21d(10d-3)$  

•  $21d(10d+3)$  

•  $21(10d+3)$  

•  $21(10d-3)$  

Which graph best represents $y=10\left(0.85\right)^x$   ?

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Which function is equivalent to $y=3\left(x+2\right)^2+7$   

•  $y=3x^2+12x+33$  

•  $y=3x^2+12x+19$  

•  $y=3x^2+19$  

•  $y=3x^2+33$