2 years ago

15 - 4x = -9x + 75

Mathematics

1 answer:

algol132 years ago

8 0

Answer:

x=12

Step-by-step explanation:

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If 3 3/4 lb of candy costs 20 .25 how many would 1 lb of candy cost

Mrac [35]

solution:

$\frac{c}{w}=\frac{20.25}{\frac{3}{4}}\\\frac{c}{1}=\frac{20.25\times 4}{3}\\\frac{c}{1}=\frac{81}{3}\\c=27\\1Ib cost is \$ 27$

3 0

3 years ago

Assume that 33.4% of people have sleepwalked. Assume that in a random sample of 1459 adults, 526 have sleepwalked.

lutik1710 [3]

Answer:

Step-by-step explanation:

Given that 33.4% of people have sleepwalked.

Sample size n =1459

Sample favourable persons = 526

Sample proportion p = $\frac{526}{1459} \\=0.361$

Sample proportion p is normal for large samples with mean = 0.334 and

std error = $\sqrt{\frac{pq}{n} } \\=\sqrt{\frac{0.334(1-0.334)}{1459} } \\=0.0123$

a) P(526 or more of the 1459 adults have sleepwalked.)

$=P(p\geq 0.361)\\=P(Z\geq \frac{0.361-0.334}{0.0123} \\=P(Z\geq 2.20)\\=0.5-0.4861\\=0.0139$

b) Yes, because hardly 1.4% is the probability

c) 33.4 is very less compared to the average. Either sample should be improved representing the population or population mean should be increased accordingly.

7 0

3 years ago

The volume of a wooden block is 6.3 cubic inches .this equivalent to how many cubic centimeters

Natalija [7]

Answer:

$103.24\ cm^3$

Step-by-step explanation:

we know that

$1\ in=2.54\ cm$

we have

$6.3\ in^3$

Convert in³ to cm³

$6.3\ in^3=6.3(2.54^3)=103.24\ cm^3$

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3 years ago

Identify the maximum or minimum point from the graphType your answer as an ordered pair (x,y)

Zepler [3.9K]

We have a parabola.

As it is concave down, we have one maximum and no minimum.

We can identify the maximum at point (-2, 4).

Answer: (-2,4)

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1 year ago

What's the square of the quantity of 18 less than x

Zigmanuir [339]

(18 - x)^2

If (a - b)^2 then the answer is a^2 - 2ab + b^2

18^2 - 36x + x^2

The answer is x^2 - 36x + 324

8 0

3 years ago