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

Answer 1

Answer: 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

Answer 2

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

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jack works after school. each day he earns a set amount, plus an hourly wage. write a linear function f jack can use to determine his pay. QUICK

Answers

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Simply the following radical expressions completely. Use the radical symbol in the equation editor to enter your response. 2✔️48

Answers

Answer:

$\huge \boxed{8√(3)}$

Step-by-step explanation:

$2√(48)$

Simplify $√(48)$ .

$2√(16) √(3)$

$√(16)=4$

$2 * 4√(3)$

Apply rule : $a * b√(c) =ab√(c)$

$8√(3)$

3/2 x -9 = 0 hiiiiiiiii please help :)

Answers

Answer:

x=6

Step-by-step explanation:

3/2x-9+9=0+9

3/2x=9

2. 3/2x=9. 2

3x=18

3x/3=18/3

x=6

Answer:

Hewo There!!

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Solve for x by simplifying both sides of the equation, then isolating the variable.

x = 6

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A camp stove that was $175.99 is now $155.99. what percent discount are you getting?

Answers

your getting a $20 dollar discount

Which expressions have a value of 33A. 15+(8*3-6)
B. (30+6)/6+3*2^2
C.40-[5*(3+1)+8]
D.[(3+5)*2-5]*3

Answers

let's look through the options one by one:
A. 15+(8*3-6)
inside the parentheses, we multiply first
15+(24-6)
now simplify the rest of the parentheses
15+18
33
so answer "A'' equals 33
B. (30+6)/6+3*2^2
we simplify the inside of the parentheses
36/6+3*2^2
we simplify the exponent
36/6+3*4
6+12
18
So NO, answer "B" is not correct
C. 40-[5*(3+1)+8]
all the way on the inside of the parentheses,
40-[5*4+8]
multiplying comes before adding, so
40-[20+8]
inside the brackets,
40-28
12
So answer "C" is also incorrect
D. [(3+5)*2-5]*3
inside the parentheses
[8*2-5]*3
multiplying before subtracting
[16-5]*3
11*3
33
So the only answers that equal 33 are answer "A" and answer "D" equal 33

Evaluate x²-6x when x=3-i.

Answers

Answer:

Step-by-step explanation:

We are going to substitute x = 3 - i into the expression x² - 6x

* Remember than i² = (√-1)² = -1. so when we multiply and get i² we're going to transform it into -1.*

⇒ $x^2-6x = (3 - i)^2 - 6 (3-i) = 9 - 6i+i^2 -18+6i\n=9 - 6i-1-18+6i\n=-10$

Thus, x² - 6x = 10 when x = 3-i

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