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umka21 [38]
3 years ago
6

CAN SOMEONE HELP ME PLZ NO LINKS

Mathematics
1 answer:
Vesnalui [34]3 years ago
3 0

Answer:

length = 2w - 3

l = length

w = width

2(length) + 2(width) = perimeter

2(2w - 3) + 2(w) = 60

6w -6 =60

w = 11

len = 2(11) - 3

Step-by-step explanation:

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There are an infinite number of chords that can be created in a circle.<br><br> True<br><br> False
Dmitriy789 [7]
 i think it is false cause i dont know i geuss

8 0
3 years ago
The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.
inessss [21]

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

That is,

Consider X be the length of the pregnancy

Mean and standard deviation of the length of the pregnancy.

Mean \mu =266\\

Standard deviation \sigma =15

For part (a) , to find the probability of a pregnancy lasting 308 days or longer:

That is, to find P(X\geq 308)

Using normal distribution,

z=\frac{X-\mu}{\sigma}

z=\frac{308-266}{15}

=\frac{42}{15}

Thus z=2.8

So P\left (X\geq 308  \right )=1-P(X

=1-P(z

=1-Table\:  value\:  of\:  2.8

=1-0.99744

=0.00256

Thus the probability of a pregnancy lasting 308 days or longer is given by 0.00256.

This the answer for part(a): 0.00256

For part(b), to find the length that separates premature babies from those who are not premature.

Given that the length of pregnancy is in the lowest 3​%.

The z-value for the lowest of 3% is -1.8808

Then X=\frac{X-\mu}{\sigma}\Rightarrow X=z*\sigma+\mu

This implies X=-1.8808*15+266=237.788

Thus the babies who are born on or before 238 days are considered to be premature.

5 0
3 years ago
What is the equation of a line that is parallel to x−2y=−4 and passes through the point (0, 0)?
galina1969 [7]

Answer:

The equation of a line that is parallel to x−2y=−4 and passes through the point (0, 0) will be:  x-2y=0

Step-by-step explanation:

Given the line

x-2y=-4

x+4 = 2y

y=\left(\frac{1}{2}\right)x+2

m_1=\frac{1}{2}

so, the slope of the line parallel to the given line would have

the same slope as  \frac{1}{2}=m, and passed through the point (0, 0).

Therefore, the equation of the required line is given by

y = mx+b

y=\left(\frac{1}{2}\right)x+0

y=\left(\frac{1}{2}\right)x

2y=x

x-2y=0

Therefore,  the equation of a line that is parallel to x−2y=−4 and passes through the point (0, 0) will be:  x-2y=0

5 0
3 years ago
Your famous cookie recipe calls for
damaskus [11]

Answer:

I GOT -42 SO LIKE 4 1/2

Step-by-step explanation:

3 0
3 years ago
If f(x)=x^2-9/x+3 is continuous at x=-3, find f(-3). <br><br> A. 3<br> B. -3<br> C. -6<br> D. 6
melamori03 [73]

Answer:

x = 3

Step-by-step explanation:

x^2 - 9 = (x+3)(x-3)

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x - 3 = 0

x = 3

3 0
3 years ago
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