Question

Evaluate the expression 2x + 3y - 4z + 9 when x = 2, y = 3, and z = 4.​

Answer 1

Answer:

Step-by-step explanation:

2x+3y-4z+9

2(2)+3(3)-4(4)+9

4+9-16+9

=6

Answer 2

Given :-

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• x = 2
• y = 3
• z = 4

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To find :-

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• 2x + 3y - 4z + 9

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Solution :-

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$\sf:\implies \: {\bold{ 2\times 2 + 3\times 3 - 4\times 4 + 9 }}$

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$\sf:\implies \: {\bold{ 4 + 3\times 3 - 4\times 4 + 9 }}$

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$\sf:\implies \: {\bold{ 4 + 9 - 4\times 4 + 9 }}$

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$\sf:\implies \: {\bold{ 4 + 9 - 16 + 9 }}$

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$\sf:\implies \: {\bold{ 4 + 9 + 9 - 16 }}$

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$\sf:\implies \: {\bold{ 13 + 9 - 16 }}$

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$\sf:\implies \: {\bold{ 22 - 16 }}$

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$\sf:\implies \: {\bold{ 6 }}$

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