第1章基礎

$9x+7$ when $x=3$

$5x-4$ when $x=6$

$x^4$ when $x=3$

$3^x$ when $x=3$

$x^2+5x-8$ when $x=6$

$2x+4y-5$ when
$x=7,y=8$

the sum of 8 and 12

the sum of 9 and 1

the difference of $x$ and 4

the difference of $x$ and 3

the product of 6 and $y$

the product of 9 and $y$

Adele bought a skirt and a blouse. The skirt cost $15 more than the blouse. Let $b$ represent the cost of the blouse. Write an expression for the cost of the skirt.

Marcella has 6 fewer boy cousins than girl cousins. Let $g$ represent the number of girl cousins. Write an expression for the number of boy cousins.

$\text{−}m$ when
ⓐ $m=3$
ⓑ $m=\mathrm{-3}$

$\text{−}p$ when
ⓐ $p=6$
ⓑ $p=\mathrm{-6}$

ⓐ $\left|y\right|$ when $y=\mathrm{-37}$
ⓑ $\left|\text{−}z\right|$ when $z=\mathrm{-24}$

$x+8$ when ⓐ $x=\mathrm{-26}$ⓑ $x=\mathrm{-95}$

$y+9$ when ⓐ $y=\mathrm{-29}$ ⓑ $y=\mathrm{-84}$

When $b=\mathrm{-11}$, evaluate:ⓐ $b+6$ ⓑ $\text{−}b+6$

When $c=\mathrm{-9}$, evaluate:
ⓐ $c+\left(\mathrm{-4}\right)$>ⓑ $\text{−}c+\left(\mathrm{-4}\right)$

$p^2-5p+2$ when
$p=\mathrm{-1}$

$q^2-2q+9$ when $q=\mathrm{-2}$

$6x-5y+15$ when $x=3$ and $y=\mathrm{-1}$

$3p-2q+9$ when $p=8$ and $q=\mathrm{-2}$

the sum of $\mathrm{-4}$ and $\mathrm{-17}$, increased by 32

the quotient of $\mathrm{-45}$ and $\mathrm{-9}$

the product of $\mathrm{-12}$ and the difference of $c\text{and}d$

Temperature The high temperature one day in Miami Beach, Florida, was $76\text{°}$. That same day, the high temperature in Buffalo, New York was $\text{−}8\text{°}$. What was the difference between the temperature in Miami Beach and the temperature in Buffalo?

Checking Account Adrianne has a balance of $\text{−}\mathrm{\$22}$ in her checking account. She deposits $301 to the account. What is the new balance?