Choice B
Choice H
$$=8+20x+9-2x$$
$$=18x+17$$
Choice C
$$(-2,8)+(8,-2)=(6,6)$$
Choice K
$$=17\times70+20\times n$$
Choice C
$$\frac{60}{80}=0.75$$
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Choice F
$$180-114=66$$
$$66\div2=33$$
Choice E
$$P=\frac{blue+yellow}{28}$$
$$=\frac{8+4}{28}$$
$$=\frac{12}{28}$$
$$=\frac{3}{7}$$
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Choice G
$$\frac{60}{1\frac{1}{2}}$$
$$=\frac{60}{\frac{3}{2}}$$
$$=60\times\frac{2}{3}$$
$$=40$$
Choice D
$$62\ is\ the\ lowest\ score.$$
$$(78+83+86+93)\div4=85$$
Choice F
$$5y=m-n$$
$$y=\frac{m-n}{5}$$
Choice D
$$5+2x=19$$
$$2x=19-5=14$$
$$x=7$$
$$3x=21$$
Choice H
$$\frac{24}{4}=6$$
$$6\times6=36$$
Choice C
$$7\times10^{-2}\times4.58\times 10^{6}$$
$$=32.06\times10^{4}$$
$$=320600$$
Choice D
$$c\lt d,\ e\lt c,\ e\gt b,\ b\gt a$$
$$\Rightarrow a\lt b \lt e\lt c \lt d$$
Choice F
$$=\frac{2\times4+1\times6}{2\times1-4\times6}$$
$$=\frac{8+6}{2-24}$$
$$=\frac{14}{-22}$$
$$=\frac{7}{-11}$$
Choice B
$$red:\ r,\ blue:\ b$$
$$Lance=3\ medium+3\ large$$
$$medium=5r+3b$$
$$large=10r+5b$$
$$Lance=3(5r+3b)+3(10r+5b)$$
$$=15r+9b+30r+15b$$
$$=45r+24b$$
$$\Rightarrow 24\ blue$$
Choice J
$$80=2^{4}\times5$$
$$70=2\times5\times7$$
$$30=2\times3\times5$$
$$[L.C.M]=2^{4}\times3\times5\times7=1680$$
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Choice B
$$It's\ a\ 5-12-13\ triangle.$$
$$(5+12)-13=4$$
Choice K
$$(a^{8})^{24}$$
$$=a^{8\times24}$$
$$=a^{192}$$
Choice D
$$h(-3)$$
$$=4(-3)^{2}-3(-3)$$
$$=36+9$$
$$=45$$
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Choice K
$$\Rightarrow p-0.3p$$
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Choice B
$$1.29\times\frac{2}{5}=0.516$$
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Choice K
Its cost is $5, so …
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Choice D
$$6!=1\times2\times3\times4\times5\times6$$
$$3!=1\times2\times3$$
$$2!=1\times2$$
$$\Rightarrow \frac{1\times2\times3\times4\times5\times6}{1\times2\times3\times1\times2}$$ …
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Choice K
$$x+y=1000---(1)$$
$$0.05x+0.25y=90---(2)$$
$$(2)\times20$$
$$\Rightarrow x+5y=1800---(3)$$ …
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Choice C
$$\Box= 2\times2=4$$
$$4-1\times1\times\pi$$
$$=4-\pi$$
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Choice K
$$4:7=20:x$$
$$4x=140$$
$$x=35 $$
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Choice C
$$\frac{20}{x}=\tan 50°$$
$$x=\frac{20}{\tan 50°}$$
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Choice H
It's the definition of a …
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Choice A
$$3x-7 \lt 5+9x $$
$$\Rightarrow …
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Choice H
$$2\pi r$$
$$=2\times3.14\times4$$
$$=25.12$$
$$\approx …
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Choice B
$$-5\mid-8+9\mid$$
$$=-5(1)$$
$$=-5$$
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Choice H
$$x=(at\ least\ 1\ class\ of\ …
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Choice D
$$Marigolds:\ 60\times1+40\times4+?\times6$$
$$=60+160+6?$$
$$Petunias:\ 25\times4+100\times6$$ …
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Choice K
$$1\times60\times\frac{1}{10}=6$$
$$6\times x=15$$
$$x=2.5$$
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Choice B
$$1\times30=30$$
$$30=4\times7...2$$
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Choice K
$$Y=(c+a,b)$$
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Choice B
$$x=90°-50°=40°$$
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Choice F
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Choice D
$$r=\frac{10}{2}=5$$
$$V=\pi r^{2}h$$
$$1000= 3.14\times5^{2}\times …
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Choice J
$$1-\frac{1}{12}\times3=\frac{9}{12}$$
$$\frac{9}{12}\times\frac{1}{5}=\frac{3}{20}$$
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Choice A
$$x=\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}$$
$$\Rightarrow x=\frac{5\pm\sqrt{25-4(1)(3)}}{2(1)}$$
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Choice F
$$\frac{(9,-13)+(a,b)}{2}=(1,-6)$$
$$9+a=1\times2$$
$$\Rightarrow a=-7$$
$$-13+b=-6\times2$$ …
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Choice B
$$\cos 75°=\frac{x}{10}$$
$$x=10\cos 75°$$
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Choice K
The intercept with the Y …
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Choice D
$$(18+10)\times3\times\frac{1}{2}=42$$
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Choice G
$$y=mx+b$$
$$C=0.99\times H+0$$
$$m=0.99$$
$$0.99\ …
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Choice D
$$\frac{10}{4}=2.5$$
$$\frac{25}{10}=2.5$$
$$25\times2.5=62.5$$
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Choice J
$$64=4\times4\times4$$
$$4\times4\times6=96$$
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Choice C
$$2\pi r=2\pi(4)=8\pi$$
$$8\pi-7\pi=\pi$$
$$\frac{\pi}{8\pi}\times360°=45°$$
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Choice K
The general equation for a …
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Choice D
$$\frac{18}{\sin 47°}=\frac{x}{\sin 76°}$$
$$x=\frac{18\sin 76°}{\sin …
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Choice F
$$\sqrt{2}(l+x)-\sqrt{2}x$$
$$=\sqrt{2}l$$
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Choice E
$$If\ x\leq2...$$
$$Let\ x=1$$
$$\mid …
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Choice H
$$More\ or\ equal\ to\ 6=25-(fewer\ …
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Choice B
$$\cos x=-\frac{1}{3}$$
$$(\cos x)^{2}=\frac{1+\cos 2x}{2}$$ …
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Choice F
$$y=f(g(x))$$
$$\Rightarrow 6=f(g(4))$$
$$g(4)=10(4)+b=40+b$$
$$f(40+b)=\sqrt{40+b}=6=\sqrt{36}$$ …
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Choice A
$$\Rightarrow10\times10=100$$
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Choice F
$$a\gt 0$$
$$b^{2}\gt 0$$
$$c^{4}\gt …
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