3 years ago

Find the percent error of 4cm and 0.2 cm? Please help, thanks.

Mathematics

1 answer:

Readme [11.4K]3 years ago

3 0

The percent error is 1,900%

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20x^2-30=4x solve for x

ankoles [38]

Answer:

x=1.3288 or -1.1288

Step-by-step explanation:

Given $20x^{2}-30=4x$

Subtract 4x from both sides

$20x^{2}-4x-30=0$

Since we can factor out 2 from whole equation, let's factor out 2.

$2(10x^{2}-2x-15)=0$

Divide with 2 on both sides

$10x^{2}-2x-15=0$

We got the quadratic equation, we can solve for x using quadratic formula.

$x=\frac{-b\pm\sqrt{b^{2}-4ac} } {2a}$

$x=\frac{2\pm\sqrt{2^{2}-4X10X(-15)} } {2X10}$

$x=\frac{2\pm\sqrt{604} }{20}$

$x=\frac{2\pm2\sqrt{151}}{20}$

$x=1.3288or-1.1288$

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3 years ago

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Kashif bought a bicycle for rs 10000 and sold it for rs 8000 his loss percentage is

aleksley [76]

Answer:

20%

Step-by-step explanation:

Loss=C.P-S.P
Loss=10000-8000
Loss=2000

Loss%=loss/cp*100
Loss%=2000/10000*100
Loss%=20%

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2 years ago

The slope of a line is -5 and its y-intercept is 8. Discuss how you will write the equation in

Irina-Kira [14]

Y=-5x+8 I guess this is the y-intercept way

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3 years ago

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Ill give you ALL MY POINTS! PLEASE HELP DUE BY 12:00 on the dock ASAP.

bezimeni [28]

I think the Caldwell family (tbh I don’t know ‍♀️)

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3 years ago

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Which expression is equivalent to -0.8(10.8x-20+3.2x)

klemol [59]

-0.8* 10.8x= -8.64x
-0.8* -20= 16
-0.8* 3.2x =-2.56x

so it is equivalent to the expression -8.64x+16-2.56x but add like terms so it becomes -8.64x-2.56x+16. The final answer is -11.2x=16

Rate and Thanks!

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3 years ago