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3 years ago

Evalute 2x^2 – 3x when x = 4. 0 32 0 12 O 52 O 20

Mathematics

2 answers:

Elis [28]3 years ago

6 0

Answer: 20

Step-by-step explanation: Substitute the value of the variable into the equation and simplify. giving you 20

inn [45]3 years ago

6 0

Answer:

Step-by-step explanation:

Given

2x² - 3x ← substitute x = 4

= 2(4)² - 3(4) = 2(16) - 12 = 32 - 12 = 20

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Answer:

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Step-by-step explanation:

1) Eliot and William went hiking. They went at the same speed. Let x mph be their speed.

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$\dfrac{8}{x}+\dfrac{2}{3}=\dfrac{12}{x}\\ \\\dfrac{2}{3}=\dfrac{12}{x}-\dfrac{8}{x}\\ \\\dfrac{2}{3}=\dfrac{4}{x}\\ \\2x=3\cdot 4\ \ [\text{Cross multiply}]\\ \\2x=12\\ \\x=6\ mph$

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Final:

Speed = 44 mph

Time $=2\dfrac{2}{11}$ hours

Distance $=44\cdot 2\dfrac{2}{11}=44\cdot \dfrac{24}{11}=4\cdot 24=96\ miles$

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