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2 years ago

If f(x)=x2-1, what is f(4)?

Mathematics

2 answers:

Dmitriy789 [7]2 years ago

7 0

Explanation
4^2-1
16-1
Answer
15

Marta_Voda [28]2 years ago

7 0

Answer: 15

Step-by-step explanation:

Substitute 4 in x.

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2 ( t-3) > 2t-8, what is the correct answer

liq [111]

$2(t-3) > 2t-8\ \ \ \ |\text{use distributive property}\\\\(2)(t)+(2)(-3) > 2t-8\\\\2t-6 > 2t-8\ \ \ \ \ |\text{subtract 2t from both sides}\\\\-6 > -8\ \ \ TRUE\\\\Answer:\ t\in\mathbb{R}\ (all\ real\ numbers)$

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3 years ago

Is -0.25 or -0.05 larger?

rusak2 [61]

-0.05 is larger. Since they're negative, you're going by which is closer to 0 rather than farther. -0.05 is closer to 0 on a number line, so it's larger than -0.25.

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3 years ago

Read 2 more answers

((PLEASE ANSWER WITH A B C or D))

natali 33 [55]

Answer:

D. 60°

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you that the relationship of interest is ...

Sin = Opposite/Hypotenuse

sin(M) = ON/OM = 4(√3)/8 = (√3)/2

M = sin⁻¹((√3)/2) = 60°

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2 years ago

Plz help ASAP 20 points 5. In circle A, the length of arc BC is 20π units.

Verdich [7]

Answer: i think the answer is B or C sorry

Step-by-step explanation:

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3 years ago

Y = f(x) = 16x Find f(x) when x = 1/2

Alina [70]

Answer:

The answer depends on what the problem really is.

f(1/2) = 8

f(1/2) = 4

See below.

Step-by-step explanation:

This is the problem as it was posted:

y = f(x) = 16x

Let x = 1/2

y = f(1/2) = 16(1/2) = 8

Perhaps the problem is this:

$y = f(x) = 16^x$

If x is an exponent of 16 and not a factor, then the answer is:

$y = f(\frac{1}{2}) = 16^\frac{1}{2} = \sqrt{16} = 4$

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3 years ago