K = 3e + 5 what is the value of k when e = -2

Answers

Answer 1

Answer: $K=3e+5 \n\n K=3*(-2)+5 \n\n K=-6+5 \n\n \boxed{K=-1}$

Answer 2

Answer: Here is the work:
$K = 3e + 5 \n K=3(-2)+5 \nK=-6+5\n K=-1$

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Jack mows the lawn in 3 hours. Jane mows the same yard in 4 hours. If they worked together how much time would it take them to mow the yard?

Answers

Jack mows 1/3 of the lawn each hour.
Jane mows 1/4 of the lawn each hour.

Working together, they mow (1/3 + 1/4) of the lawn each hour.

In order to add the fractions, you need a common denominator.
12 will work:

(1/3 lawn/hour + 1/4 lawn/hour) = (4/12 + 3/12) = 7/12 lawn/hour.

This rate of work produces 12/7 hour/lawn.

12/7 hour = 1 hour 42 minutes 51.4 seconds

$(1)/(3)+(1)/(4)=(1)/(x)\n (4)/(12)+(3)/(12)=(1)/(x)\n (7)/(12)=(1)/(x)\n 7x=12\n x=(12)/(7)\hbox { h}=1\hbox{ h }42\hbox{ min } 51.43 \hbox{ s}$

When i was 4 years Old my sister was half my age now i am 100 how old is she?

Answers

Half of 4 is 2. She is 2 years younger than you. 100-2=98. She is 98.

Mr. Tom gives $30 to Bailey and Jenny. If Bailey gets twice as much money as Jenny how much will Jenny get?

Answers

Jenny will get $15 back from Mr.Tom

Jenny would get $15 from Mr.Tom

Baileys rectangular dog pen for his Irish settler must have an area of 300 square feet. Also the length must be 10 ft longer than the width. Find the dimension of the pen

Answers

Answer:

Width of rectangular pen = 10 feet

Length of rectangular pen = 20 feet

Step-by-step explanation:

We are given the following in the question:

Area of rectangular dog pen = 300 square feet

Let $x\text{ feet}$ be the width of the rectangular pen.

Then, length of the pen is given by:

$l= (x+10)\text{ feet}$

Area of rectangular pen = Area of rectangle

$A = l* w$

Putting values, we get

$200 = (x+10)x\n200 = x^2 + 10x\nx^2 + 10x-200 = 0\n (x + 20)(x - 10) = 0\nx = -20, x = 10$

Since, dimensions can never be negative, we get

Width of rectangular pen = 10 feet

Length of rectangular pen = 20 feet

Eliza Savage received a statement from her bank showing a checking account balance of $324.18 as of January 18. Her own checkbook shows a balance of $487.38 as of January 29. The bank returned all of the cancelled checks but three. The amounts of these three checks are $15.00, $77.49, and $124.28. How much did Eliza deposit in her account between January 18 and January 29?

Answers

Eliza deposit $540.95 between January 18 and January 29.... I added the checkbook balance of $324.18 with the amount of the 3 checks that were still outstanding in her account ..Hope that helps..

Can you guys please help me!!!

Answers

Answer:

It should be A

Step-by-step explanation:

I hope this helps

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