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laila [671]
3 years ago
12

a man pushes his car with a force of 30N to the right. He moves the car a distance of 3 meter to the right. What is the amount o

f work he has done? ​
Mathematics
1 answer:
Reika [66]3 years ago
3 0

Given parameters:

Force  = 30N

Distance covered  = 3m

Unknown:

Work done = ?

Work done is an important physical quantity. It is formulated as the product of force and distance.

   Work done  = Force x Distance

The unit is in Joules.

Now go ahead and input the parameters;

                  Work done  = 30 x 3  = 90J

The work done in pushing the car is 90J

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A rectangular field with perimeter of 80m is to have an area of at least 380m² . Describe the possible lengths and of the field.
Kryger [21]

let \: x \: be \: the \: length \\ let \: y \: be \: the \: width

perimeter = 2x + 2y \\ area = xy

2x + 2y = 80 \\ xy = 380 \\  \\ x + y = 40 \\ xy = 380 \\  \\ x = 40 - y \\ (40 - y)y = 380

40y - y {}^{2}  = 380 \\ y {}^{2}  - 40y + 380 = 0 \\  y {}^{2}  - 40y + 400 = 20 \\ (y - 20) {}^{2}  = 20 \\ y  - 20 =± \sqrt{20}  \\ y_{1}=20-√20≈15.52786\\ y_{2}=20+√20≈24.4721

6 0
2 years ago
Josh is saving for a new bike the bike costs about $78 including tax Josh has already saved $42 how much more does he need to so
mylen [45]
$36 because $78-$42=$36
4 0
3 years ago
Help help math math math
Finger [1]

Answer:

400

Step-by-step explanation:

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5 0
3 years ago
How would I graph these equations?<br><br> a. 2x + 3y = 12<br><br> b. x = 7
riadik2000 [5.3K]
These are 2 very different equations, and should be graphed very differently.

<u>A
</u>
<u /><u />For Part A, we must first put this in Slope Intercept Form (SIF), which is y=mx+b where "m" is the slope and "b" is the y-intercept. To do this, we should solve like a normal equation for y.

 2x+3y=12
-2x       -2x
 3y=-2x+12
 /3        /3
y=-2/3x+4

Now that we have the proper equation, it is simply to graph! We should simply make a point at (0, 4), and then go down 2, right 3 until you are satisfied with your line.

<u>B
</u>
Part B is a simple x value, which means you will draw a vertical line through 7 on the x-axis.

Below I have attached a clearly labeled graph that shows you examples of these lines. The red markings indicate x=7. The yellow circle shows you the y-intercept in Part A, while the yellow dots show you the slope in Part A.

3 0
4 years ago
IF CORRECT, I WILL MARK AS BRAINLIEST
Rainbow [258]

a)

P(t) = 19100. e^{0.06t}

b) P(8) =30866

Use formula:

P(t) = P. e^{rt}

a)

Here, P = 19100

r = 6% = 0.06

P(t) = 19100. e^{0.06t}

b) t = 2008 - 2000 = 8

P(8) = 19100. e^{0.06\times 8}

P(8) = 19100. e^{0.48}

P(8) = 19100\times 1.616\\\\P(8) = 30,865.6\\\\P(8) \approx 30,866

8 0
3 years ago
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