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Karo-lina-s [1.5K]

3 years ago

5

Miss Sandy is fencing in her rectangular backyard, which is 3x23x2 feet wide and 4xy+5x3y24xy+5x3y2 feet long. a.) Find the peri

meter of Miss Sandy's yard. Show all work. b.) How much fencing should Miss Sandy purchase? Use mathematics to justify your answer.

1 answer:

liraira [26]3 years ago

6 0

<span>3x23x2= 138 feet wide by 28xy + 10x6y + 2 feet long B) purchase 140 feet X (28xy + 10x6y) fencing</span>

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if layla can right 20 essays in 15 minutes and 8 in 6 minutes then how many can she right in 45 minutes?

scoray [572]

Answer:

60! hope this helps!

Step-by-step explanation:

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3 years ago

What slope would a line have to be perpendicular to a line with a slope of 1/4 ?

denpristay [2]

Answer:

A line perpendicular to another has a slope that is the negative reciprocal of the slope of the other line. The negative reciprocal of the original line is –2, and is thus the slope of its perpendicular line.

Step-by-step explanation:

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3 years ago

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An amount of 25,000 is borrow for 15 years at 5.5% interest, compounded annually. If the loan is paid in full at the end of that

Airida [17]

Answer: $55,811.91$

Step-by-step explanation:

Given

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Time Period is $t=15\ yr$

Rate of interest $r=5.5\%$

Amount in compound interest is given by

$\Rightarrow A=P\left(1+r\%\right)^t$

Insert the values

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Therefore, $55,811.91$ must be paid back

7 0

3 years ago

Help im still lazy lol

jonny [76]

Answer:

t=-105

Step-by-step explanation:

$-\frac{1}{15} t =7$

What we need to do here is to isolate t.

Let's multiply both sides by -15.

$-\frac{1}{15}t * -15 = 1t$

7*-15= -105

t=-105

6 0

3 years ago

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Verify that P = Ce^t /1 + Ce^t is a one-parameter family of solutions to the differential equation dP dt = P(1 − P).

NemiM [27]

Answer:

See verification below

Step-by-step explanation:

We can differentiate P(t) respect to t with usual rules (quotient, exponential, and sum) and rearrange the result. First, note that

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Now, differentiate to obtain

$\frac{dP}{dt}=(\frac{ce^t}{1+ce^t})'=\frac{(ce^t)'(1+ce^t)-(ce^t)(1+ce^t)'}{(1+ce^t)^2}$

$=\frac{(ce^t)(1+ce^t)-(ce^t)(ce^t)}{(1+ce^t)^2}=\frac{ce^t+ce^{2t}-ce^{2t}}{(1+ce^t)^2}=\frac{ce^t}{(1+ce^t)^2}$

To obtain the required form, extract a factor in both the numerator and denominator:

$\frac{dP}{dt}=\frac{ce^t}{1+ce^t}\frac{1}{1+ce^t}=P(1-P)$

3 0

3 years ago