Variable Definition Test

Question 1 of 5: Evaluate each

$$5x^2-3\hspace{.25em}for\hspace{.25em}x=7$$ $$5x^2-3\hspace{.25em}$$$$for\hspace{.25em}x=7$$

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$$315$$

$$0$$

$$1222$$

$$212$$

$$242$$

Question 2 of 5: Evaluate each

$$-12x^2-3z+9y\hspace{.25em}for\hspace{.25em}x=-1,y=1,z=13$$ $$-12x^2-3z+9y$$$$for$$$$x=-1$$$$y=1$$$$z=13$$

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$$-42$$

$$-18$$

$$22$$

$$144$$

$$30$$

Question 3 of 5: Simplify

$$5(-8x-7)+2(1-5x)$$ $$5(-8x-7)+2(1-5x)$$ $$5(-8x-7)\hspace{.25em}+2(1-5x)$$

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$$50x+33$$

$$-75x+12$$

$$-50x+22$$

$$-30x-33$$

$$-50x-33$$

Question 4 of 5: Simplify

$$-7(x-5)+7(x-3)$$ $$-7(x-5)+7(x-3)$$

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$$18x$$

$$14$$

$$-14x + 14$$

$$14x-56$$

$$-56$$

Question 5 of 5: Simplify

$$-4.9(x+0.9)-5.8(-0.8x-6.8)$$ $$-4.9(x+0.9)-5.8(-0.8x-6.8)$$

Finish »

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$$-0.6x+25.42$$

$$8.2x+32$$

$$-0.26x+35.03$$

$$-5.6x$$

$$-9.54x+35.03$$

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