**Choice A**

$$XY=5k\\$$ $$YZ=9k \\$$ $$\Rightarrow XZ=14k\\$$ $$\Rightarrow \frac{XY}{XZ}=\frac{5k}{9k}=\frac{5}{9}$$

**Choice G**

$$2x+4\geq -8 \\$$ $$\Rightarrow 2x\geq -8-4 \\$$ $$\Rightarrow x\geq \frac{-8-4}{2}\\$$ $$\Rightarrow x\geq -6$$

**Choice G**

$$a_1=10 \\$$ $$d=2 \\$$ $$a_n=10+2(n-1)=2n+8 \\$$ $$S_n=\frac {a_1+a_n}{2}\cdot n=\frac {10+2n+8}{2}\cdot n=220 \\$$ $$n=11$$

**Choice B**

$$\frac {9+x}{2}=3 \\$$ $$\frac {-11+y}{2}=-7 \\$$ $$\Rightarrow x=-3 ,\ y=-3$$

**Choice K**

$$median=250 \\$$ $$mean=\frac {200+250+300+150+275}{5}=235 \\$$ $$\Rightarrow median - mean = 250-235=15$$

**Choice G**

The longer length of the smaller rectangle (S2) = 12-5=7

$$Total\ area = S1+S2=10 \times 5 + 3 \times 7=71$$

**Choice A**

x+(x+3)+(x+5)=26 => x=6

**Choice J**

$$t=\frac{480}{4}=120 \ minutes = 2 …

**Choice A**

v+c+s=42

c=v+11v=s+2

=> c=s+13 …

**Choice G**

$$BC=\sqrt{AC^2-AB^2}=\sqrt{10^2-8^2}=6\\$$ $$BD=\frac{BC}{2}=3\\$$ $$\Rightarrow AD=\sqrt{BD^2+AB^2}=\sqrt{3^2+8^2}=\sqrt{73}$$

**Choice C**

$$x=\frac{(-2)+(-1)+(-2)+1+4}{5}=0 \\$$ $$y=\frac{4+1+(-2)+(-1)+(-2)}{5}=0 $$

**Choice H**

$$10, -5, \frac{5}{2}, -\frac{5}{4}, \frac{5}{8}, …

**Choice C**

**Monday:**

The daily amount for …

**Choice H**

To find the roots of …

**Choice D**

$$BC=\sqrt{AB^2+AC^2}=13$$

Total distance of the …

**Choice G**

The number of students NOT …

**Choice D**

$$\sqrt{x}+3=6 \\$$ $$\Rightarrow \sqrt{x}=3 \\$$ …

**Choice H**

$$\sin A = \frac{3}{4}=\frac{BC}{AB}=\frac{12}{AB} \\$$ …

**Choice A**

$$3(\log_2 16)=3(\log_2 2^4)=3(4)=12$$

**Choice F**

F. is apparently true, because …

**Choice B**

Total distance travelled in 1 …

**Choice G**

$$\frac{5 \ seconds}{2.25 \ minutes …

**Choice E**

$$The\ slope \approx \frac{200\ ft}{50\ …

**Choice J**

$$10^5(0.5\times10^2+2.5\times10+6)=10^5(50+25+6)=81\times10^5=8.1\times10^6 \\$$ $$\Rightarrow 8\times10^6<8.1\times10^6 …

**Choice D**

A. { 10, 10, 10, …

**Choice K**

Diameter of the circle = …

**Choice B**

a=30-3-3=24 feet

b=40-3-3=34 feet

Therefore, …

**Choice F**

$$g(f(x))=\frac{1}{4-f(x)}=\frac{1}{4-x^2}$$ Choice F.

**Choice C**

$$C=2 \pi r=2 \pi \sqrt{2} …

**Choice F**

The graph of the function …

**Choice A**

Only Choice A satisfies that …

**Choice H**

When x become really large, …

**Choice B**

The probability of drawing a …

**Choice K**

The expression is undefined whenever …

**Choice E**

$$\frac{\frac{2}{5}+\frac{8}{7}}{2}=\frac{27}{35}$$

**Choice H**

$$3^{x^2-x-2}=1=3^0\\$$ $$x^2-x-2=0\\$$ $$(x-2)(x+1)=0\\$$ $$\Rightarrow x=2,-1$$

**Choice D**

The major radius p is …

**Choice J**

$$p=\frac{3+1}{10}=\frac{4}{10}$$

**Choice B**

$$Area \ of \triangle ABC …

**Choice J**

$$\frac{59\%\times66}{15}\times5=12.98$$ Choice J.

**Choice D**

Area of shaded portion = …

**Choice F**

The median will stay the …

**Choice A**

The ticket cost is $$5\times1+3\times10$$ …

**Choice F**

$$I. n\downarrow+(n+1)=(n+1)\downarrow$$ $$(1+2+3+...+n)+(n+1)=1+2+3+...+n+(n+1)=(n+1)\downarrow\\$$ Therefore, I. …

**Choice E**

$$(x-4)(x-4)\times2=72\\$$ $$x=10 \\$$ $$\Rightarrow 10 …

**Choice K**

Let's start with K. To …