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4 years ago

How do you do this function (t - 4)(t + 4)

Mathematics

2 answers:

xz_007 [3.2K]4 years ago

6 0

Answer:

t^2-4^2= t^2-16

(a+b)(a-b)

Flauer [41]4 years ago

4 0

Answer: t^2-16

Explanation:
Use FOIL (First Inner Outter Last)
So First: t x t = t ^2
Inner: t x 4 = 4t
Outter: -4 x t = -4t
4 x 4 = 16

Combine:
= t^2 + 4t - 4t + 16 (-4t + 4t = 0)
= t^2-16

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What is the value of x?

Ksenya-84 [330]

Step-by-step explanation:

$\frac{360 - 2(x + 30)}{2} = x \\ 360 - 2x - 60 = 2x \\ 300 - 4x = 0 \\ 4x = 300 \\ x = 300 \div 4 = 75$

4 0

3 years ago

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Which of the following statements is not true? a) The standard deviation of the sampling distribution of sample mean = σ/√n b) T

I am Lyosha [343]

Answer:

e) The mean of the sampling distribution of sample mean is always the same as that of X, the distribution from which the sample is taken.

Step-by-step explanation:

The central limit theorem states that

"Given a population with a finite mean μ and a finite non-zero variance σ2, the sampling distribution of the mean approaches a normal distribution with a mean of μ and a variance of σ2/N as N, the sample size, increases."

This means that as the sample size increases, the sample mean of the sampling distribution of means approaches the population mean. This does not state that the sample mean will always be the same as the population mean.

6 0

4 years ago

2.) Una pizza cuesta $12. Alfred compró 4_2/3 pizzas. ¿Cuanto gastara le sobra de $60? a.) $56 b.) $14 c.) $4

zhenek [66]

Answer:

$56 or $4 left over from $60

$ 56 o $ 4 sobrantes de $ 60

Step-by-step explanation:

4 2/3 pizzas would cost $56

4 2/3 pizzas costarían $ 56

5 0

3 years ago

Fill in the table of values so that this is a proportional relationship with k=3/2

Zigmanuir [339]

Step-by-step explanation:

the table is non-existent

3 0

3 years ago

Pls help me I kinda don’t get it.

suter [353]

A). Pi m

Explanation:

Arc length formula:

Arc length = (Ø/360°) * 2*Pi*r
Ø = given angle (degrees)
r = radius

Plug given numbers in:

(45°/360°)* 2* Pi * 4
This will give you the answer of Pi

4 0

4 years ago