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ehidna [41]
4 years ago
11

Please help I’m not good at this

Mathematics
2 answers:
tia_tia [17]4 years ago
8 0
23/4

Step by step:
5/1 + 3/4
5/1 • 4 = 20/4
20+3/4
23/4
Westkost [7]4 years ago
6 0
5.75 i believe if that’s what you’re asking
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3 years ago
While traveling in a car, the centrifugal force a passenger experiences as the car drives in a circle varies jointly as the mass
rjkz [21]

Answer:

A- 129.6 N

Step-by-step explanation:

Since the centrifugal force on the passenger, F varies jointly as the mass of the passenger, m and the square of the speed of the car,v. In mathematical notation, F ∝ mv² ⇒ F = kmv².

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k = \frac{F_{1} }{m_{1}v_{1} ^{2}  } = \frac{F_{2} }{m_{2}v_{2} ^{2}  }\\ F_{2} = F_{1} \frac{m_{2} }{m_{1} }(\frac{v_{2} }{v_{1} }) ^{2}    \\F_{2} =  226.8\frac{90 }{70 }(\frac{40 }{60 }) ^{2}\\F_{2} = 129.6 newtons

3 0
3 years ago
A rectangle's length is twice its width. if the perimeter is 120 cm, find the width of the rectangle.
dangina [55]
Let's use the formula to find the perimeter of a rectangle.
2l+2w=120
We know that the length is twice its width; the equation would be:L=2w
We can plug that in to the formula.
2(2w)+2w=120
4w+2w=120
6w=120
120÷6=20=w
Since the length is twice its width, 20×2=40. The length is 40 cm.
The width is 20 cm.
Tell me if this helps!!
4 0
3 years ago
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