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3 years ago

Solve for x x^2-10x+25=35

Mathematics

1 answer:

ZanzabumX [31]3 years ago

7 0

Answer:5 + /- sqrt35

Step-by-step explanation:

Rearranging, we get x^2 -10x -10=0

Applying the quadratic formula,

(10 +/- sqrt(10^2 -4*-10))/2

(10+/- 2sqrt35) /2 = 5 + /- sqrt35 as the two roots.

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Step-by-step explanation:

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3 years ago

Jon is looking into a 4250 vacation package that is offered for 25% off. there's a 9% resort fee added on to the total. How much

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given number/ 1 multiplied by percentage/100

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8 0

3 years ago

From 1995 - 2008 in the US 648 people were struck by lightening. 531 of them were men. You want to see if this observation diffe

Gre4nikov [31]

Answer:

Because z is higher than any given value in the chart we come to the conclusion To reject null hypothesis

Step-by-step explanation:

Sample proportion = p= 531/648 = 0.8194

This is the proportion of men that were hit by lightening

Null hypothesis: H0: p = 0.5

Alternate hypothesis: H1: p ≠ 0.5

Test statistics z = 0.8194-0.5/(√0.5x0.5/648)

= 0.8194-0.5/√0.0003858

= 0.3194/0.019642

= 16.26

Since the z > 1.96 (at 5% significance) we reject the null hypothesis.

Therefore in conclusion we say z is higher than given values in the chart so we reject null hypothesis.

Please check attachment!

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3 years ago