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3 years ago

Find y when x = 5, if y = 12.6 when x = 14.

Mathematics

1 answer:

Maurinko [17]3 years ago

6 0

14 divided by five = 2.8 which is the ratio between the two x's. So 12.6 divided by 2.8 is 4.5. That is y when x=5

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Roger says that the equation x²-12x+36=0 has only one solution, Regina says Roger is wrong and that the fundamental theorem of a

solniwko [45]

Answer:

The answer is that Regina is absolutely right

Step-by-step explanation:

Hello!

The answer is that Regina is absolutely right, this is because the fundamental theorem of algebra states that every polynomial equation has the same number of solutions as its highest exponent, for this case it is 2. Therefore, there are two values of X that cause the equation to result in zero

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3 years ago

The heights of women in the USA are normally distributed with a mean of 64 inches and a standard deviation of 3 inches.

Rainbow [258]

Answer:

(a) 0.2061

(b) 0.2514

Step-by-step explanation:

Let <em>X</em> denote the heights of women in the USA.

It is provided that <em>X</em> follows a normal distribution with a mean of 64 inches and a standard deviation of 3 inches.

(a)

Compute the probability that the sample mean is greater than 63 inches as follows:

$P(\bar X>63)=P(\frac{\bar X-\mu}{\sigma/\sqrt{n}}>\frac{63-64}{3/\sqrt{6}})\\\\=P(Z>-0.82)\\\\=P(Z$

Thus, the probability that the sample mean is greater than 63 inches is 0.2061.

(b)

Compute the probability that a randomly selected woman is taller than 66 inches as follows:

$P(X>66)=P(\frac{X-\mu}{\sigma}>\frac{66-64}{3})\\\\=P(Z>0.67)\\\\=1-P(Z$

Thus, the probability that a randomly selected woman is taller than 66 inches is 0.2514.

(c)

Compute the probability that the mean height of a random sample of 100 women is greater than 66 inches as follows:

$P(\bar X>66)=P(\frac{\bar X-\mu}{\sigma/\sqrt{n}}>\frac{66-64}{3/\sqrt{100}})\\\\=P(Z>6.67)\\\\\ =0$

Thus, the probability that the mean height of a random sample of 100 women is greater than 66 inches is 0.

8 0

3 years ago

Can I please get help

Elina [12.6K]

7.55t + 100 ≥ 160 ( its greater than r equals to 160)

7.55t ≥ 60
t ≥ 7.95

Minimum number of hours = 8 ( to nearest hour).

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4 years ago

Janna is helping her chorus collect money to fund a field trip. Each bar of toffee sells for $1.25 and each box contains 30 bars

alexandr402 [8]

M times b. independent = b dependent= m

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3 years ago

X^2=25 (round to the nearest hundreth)

EastWind [94]

Answer:

+-5

Step-by-step explanation:

$x^{2}$ =25

Square both sides to get...

x= $\sqrt{25\\}$

To simplify it, we know that 5*5=25 so..

$\sqrt{25}$ = 5

And don't forget it can be -5 or 5

5 0

3 years ago

Read 2 more answers