Ask question

Ask question

All categories

4 years ago

13

according to poll for an upcoming school board election is 40% of voters are likely to vote for the incumbent. The polls show a

margin of error of +-3 percent points.

2 answers:

JulsSmile [24]4 years ago

7 0

Best answer is I'm not sure

IrinaK [193]4 years ago

6 0

But...what's the question?

You might be interested in

What is x if x+85=x+105

vaieri [72.5K]

Answer:x+85=x+105

x+x=105+85

2x=190

x=190/2

x=95

Step-by-step explanation:

4 0

3 years ago

The general solution of 2 y ln(x)y' = (y^2 + 4)/x is

Sav [38]

Replace $y'$ with $\dfrac{\mathrm dy}{\mathrm dx}$ to see that this ODE is separable:

$2y\ln x\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{y^2+4}x\implies\dfrac{2y}{y^2+4}\,\mathrm dy=\dfrac{\mathrm dx}{x\ln x}$

Integrate both sides; on the left, set $u=y^2+4$ so that $\mathrm du=2y\,\mathrm dy$ ; on the right, set $v=\ln x$ so that $\mathrm dv=\dfrac{\mathrm dx}x$ . Then

$\displaystyle\int\frac{2y}{y^2+4}\,\mathrm dy=\int\dfrac{\mathrm dx}{x\ln x}\iff\int\frac{\mathrm du}u=\int\dfrac{\mathrm dv}v$

$\implies\ln|u|=\ln|v|+C$

$\implies\ln(y^2+4)=\ln|\ln x|+C$

$\implies y^2+4=e^{\ln|\ln x|+C}$

$\implies y^2=C|\ln x|-4$

$\implies y=\pm\sqrt{C|\ln x|-4}$

4 0

3 years ago

The time T for a car to travel from Macon to Atlanta is inversely proportional to the speed R. It takes 1.75 hours to travel bet

timofeeve [1]

First find the distance by multiplying 55mi/hr × 1.75 hrs= 96.25mi

Next find the time while traveling at 70mph using this distance. 70 miles/hr = 1hr/70 miles, so multiply 1hr/70mi x 96.25 mi= 1.38 hours

7 0

4 years ago

Which property is illustrated by the following statement? (3z)xy=3(zy)y

Nataliya [291]

The property illustrated is the Associative property of multiplication

7 0

3 years ago

Read 2 more answers

What is the sum of 4/10 and 40/100?

erik [133]

First, make the denominators the same.

10 x 10 = 100
4 x 10 = 40
So 40/100 + 40/100 = 80/100. All you need to do is simplify.

7 0

3 years ago

Read 2 more answers