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3 years ago

Solve for the fraction -3/6 - 5/7

Mathematics

1 answer:

AnnZ [28]3 years ago

7 0

Answer:

3/6-5/7 you take away 2/2 because you subtract for example 5/15 added by 6/15 equals 11/15

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How to find the y intercept for4x+6y=270

Ugo [173]

make y the subject!

4x+6y=270

6y=-4x+270

y=-2/3x+45

y-intercept is 45

4 0

2 years ago

HELP PLEASE Find the measure of the missing angles.

user100 [1]

Step-by-step explanation:

value of d = 90° ( as it's a perpendicular)

e = 49° ( vertically opposite angle)

as, sum of all angles on a straight line is 180°

so,

48° + f = 180°

f = 180 - 49 = 131°

f = 131°

hope this answer helps you dear....take care!

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2 years ago

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12. Elly's credit card record for the last 7 months is below. Based on the information from the table, what will be her new bala

bogdanovich [222]

Answer:

52145.55

Step-by-step explanation:

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3 years ago

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A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

NikAS [45]

Answer:

$0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375$

$0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377$

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

Step-by-step explanation:

Data provided

$\bar X=0.376$ represent the sample mean for the chloride concentration

$\mu$ population mean (variable of interest)

s=0.0012 represent the sample standard deviation

n=15 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

Since we need to find the critical value first we need to begin finding the degreed of freedom

$df=n-1=15-1=14$

The Confidence is 0.95 or 95%, the significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ , and the critical value for this case with a t distribution with 14 degrees of freedom is $t_{\alpha/2}=2.145$

And the confidence interval is:

$0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375$

$0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377$

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

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3 years ago

Jesse looks out the attic window of his home, which is 22 ft above the ground. At an angle of elevation of 35° he sees a bird si

Ket [755]

Answer:

Step-by-step explanation:

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2 years ago