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3 years ago

HELP PLEASE!!

Mathematics

1 answer:

Gnom [1K]3 years ago

7 0

Answer: $50 withdrawl $50 withdrawl and $65 deposite

Step-by-step : $50 withdrawl $50 withdrawl and $65 deposite

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5a+3-4a²+2a³ sandard form

tester [92]

2a^3-4a^2+5a+3

Explanation:

For standard form you always start with the one that has the biggest exponent to the least one

4 0

3 years ago

7 measured data points have a sample mean of 1403 and a standard deviation of 27. Determine the best estimate of the mean value

mina [271]

Answer:

Step-by-step explanation:

Hello!

You have sample of n=7 with mean X[bar]= 1403 and standard deviation S=27 and are required to estimate the mean with a 95%CI.

Asuming this sample comes from a normal population I'll use a stuent t to estimate the interval (a sample of 7 units is too small for the standard normal to be accurate for the estimation):

[X[bar]± $t_{n-1;1-\alpha /2}$ * $\frac{S}{\sqrt{n} }$ ]

$t_{n-1;1-\alpha /2} = t_{6;0.975}= 2.365$

[1403±2.365* $\frac{27}{\sqrt{7} }$ ]

[1378.87;1427.13]

The margin of error is the semiamplitude of the interval and you can calculate it as:

$d= \frac{Upbond-Lowbond}{2}= \frac{1427.13-1378.87}{2} = 24.13$

With a confidence level of 95% you'd expect that the real value of the mean is contained by the interval [1378.87;1427.13], the best estimate of the mean value is expected to be ± 24.13 of 1403.

I hope it helps!

4 0

3 years ago

A refrigerator has a volume given by the trinomial y^3 + 5y^2 – 14y. What are the possible dimensions of the refrigerator? Use f

Serhud [2]

Y^3 + 5y^2 - 14y

first factor out a "y"

y(y^2 + 5y - 14)

y(y + 7)(y - 2)

The dimensions are then;
y
y + 7
y - 2

7 0

3 years ago

PLEASE HELP ME 20 POINTS

masya89 [10]

Answer:

500

Step-by-step explanation:

6 0

3 years ago

Given the point (1, 3) and the slope -2, write the equation for the line in point-slope form

34kurt

Answer:

y - 3 = - 2(x - 1)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Here m = - 2 and (a, b) = (1, 3) , thus

y - 3 = - 2(x - 1) ← in point- slope form

6 0

3 years ago