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2 years ago

How do you make X the subject of the formular in: Y=Bx + C

Mathematics

1 answer:

nasty-shy [4]2 years ago

6 0

Answer:

Step-by-step explanation:

Bx + C = Y

Bx = Y - C

x = (Y - C)/B

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Jamie has 7/10 of a pound of chicken to cook for dinner if she is going to split the chicken between 3 people how much chicken w

Arisa [49]

7/10÷3=7/10×1/3=7/30

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2 years ago

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in an isosceles triangle two sides are equal. the third side is 2 less than twice the length of the sum of the two sides. the pe

egoroff_w [7]

Answer:

s for length of either equal side

b for the unequal side

b=-2+2*(s+s) and 2s+b=40

b=2*2s-2

b=4s-2

2s+4s-2=40

6s-2=40

6s=42

s=7

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3 years ago

An advertising agency that serves a major radio station wants to estimate the mean amount of time the station’s audience members

Flura [38]

Answer:

$n=(\frac{1.645(45)}{5})^2 =219.18 \approx 220$

So the answer for this case would be n=220 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\sigma = 45$ represent the population deviation

$ME = 5$ represent the margin of error

The margin of error for the true mean is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =5 and we are interested in order to find the value of n, if we solve n from equation (4) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 90% of confidence interval now can be founded using the normal distribution. The significance level is $\alpha=1-0.9=0.1$ and the critical value would be $z_{\alpha/2}=1.645$ , replacing into formula (b) we got:

$n=(\frac{1.645(45)}{5})^2 =219.18 \approx 220$

So the answer for this case would be n=220 rounded up to the nearest integer

5 0

3 years ago

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Find AB<br> Round to the nearest tenth.

zimovet [89]

19.2
To find the hypotenuse the equation would be: a^2 + b^2 = c^2.
12 squared is 144 and 15 squared is 225. Add them and you get 369. Then, square root 369 to isolate c. It'd be about 19.2

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2 years ago

The area of a circular place is 45 square inches.estimate the radius to the nearest integer

geniusboy [140]

A = π*r^2
r = √(A/π) = √(45/π) ≈ 3.78

The radius is approximately 4 inches.

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3 years ago