Question 1 of 5Evaluate 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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Select the Correct Answer Below: Correct! Not Correct!
A
$$315$$
B
$$0$$
C
$$1222$$
D
$$212$$
E
$$242$$
Question 2 of 5Evaluate 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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Select the Correct Answer Below: Correct! Not Correct!
A
$$-42$$
B
$$-18$$
C
$$22$$
D
$$144$$
E
$$30$$
Question 3 of 5Simplify
$$5(-8x-7)+2(1-5x)$$ $$5(-8x-7)+2(1-5x)$$ $$5(-8x-7)\hspace{.25em}+$$$$2(1-5x)$$
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Select the Correct Answer Below: Correct! Not Correct!
A
$$50x+33$$
B
$$-75x+12$$
C
$$-50x+22$$
D
$$-30x-33$$
E
$$-50x-33$$
Question 4 of 5Simplify
$$-7(x-5)+7(x-3)$$ $$-7(x-5)+7(x-3)$$
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Select the Correct Answer Below: Correct! Not Correct!
A
$$18x$$
B
$$14$$
C
$$-14x + 14$$
D
$$14x-56$$
E
$$-56$$
Question 5 of 5Simplify
$$-4.9(x+0.9)-5.8(-0.8x-6.8)$$ $$-4.9(x+0.9)\hspace{.25em}-$$$$5.8(-0.8x-6.8)$$
Finish »
Select the Correct Answer Below: Correct! Not Correct!
A
$$-0.6x+25.42$$
B
$$8.2x+32$$
C
$$-0.26x+35.03$$
D
$$-5.6x$$
E
$$-9.54x+35.03$$

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