10.10 Proficiency exam

( [link] ) $2y^2-3y+10=0$

( [link] ) $10b^2=3b$

( [link] ) $\left(3x+5\right)\left(x-1\right)=0$

( [link] ) $3b\left(2b-1\right)=0$

( [link] ) ${\left(a-8\right)}^2=0$

( [link] ) $4x^2-16=0$

( [link] ) $y^2-12y+32=0$

( [link] ) $a^2-5a=14$

( [link] ) $6a^2=10-11a$

( [link] ) $2x^2=-2-5x$

( [link] ) $x^3-25x=0$

( [link] ) $c^2=81$

( [link] ) $x^2=15$

( [link] ) $3a^2-18=0$

( [link] ) ${\left(x-5\right)}^2=1$

( [link] ) ${\left(y+11\right)}^2-9=0$

( [link] ) $y^2-25z^2=0$ for $y$

( [link] ) $6a^2-18b^2{c}^2$ for $a$

( [link] ) $x^2-6x-16=0$

( [link] ) $y^2-2y-7=0$

( [link] ) ${\left(m+2\right)}^2-5=0$

( [link] ) ${\left(x+b\right)}^2=c^2$

( [link] ) $\left(x+1\right)\left(x+4\right)=6$

( [link] ) $5z^2-5z-5=2z^2-z$

( [link] ) $2m^2=5m$

( [link] ) $x^2+6x-8=0$

( [link] ) $2x^2+7x-12=0$

( [link] ) The product of two consecutive odd integers is 143. What are they?

( [link] ) A study of the air quality by an environmental group suggests that $t$ years from now the level of carbon monoxide in the air, in parts per million, will be given by the quadratic equation

$A=0.4t^2+0.1t+3.1$

where $A$ represents the amount of carbon monoxide in the air.
(a) What is the level, in parts per million, of carbon monoxide in the air now?
(b) How many years from now will the level of carbon monoxide be at18.1 parts per million?

( [link] ) The length of a rectangle is 6 inches longer than the width of the rectangle. Find the dimensions of the rectangle if the area is 112 square feet.

( [link] ) $y=x^2-3$

( [link] ) $y={\left(x+1\right)}^2$

( [link] ) $y={\left(x-2\right)}^2+3$

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