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2 years ago

Pleas help grade depends on it

Mathematics

2 answers:

vovangra [49]2 years ago

8 0

Answer for the math: C

mrs_skeptik [129]2 years ago

7 0

Answer:

C. 62x+239=672

Step-by-step explanation:

X represents hours , which means 62 miles per hours equals 62x. Since Ed has already traveled 239 miles the opposite would be to add in order to subtract in the equation. 672 would be the equivalent of traveling 672 miles in x hours.

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Write 9.9.9.9<br> 9.9.9 using exponential notation

kramer

9x9x9x9x9x9x9 = 9^7

Hope you’re having a positive day

5 0

2 years ago

there are 435 representatives in the U.S. house of representatives. of the 435 representiatives, 6 are from kentucky. find the r

zhannawk [14.2K]

Answer:

2/145

Step-by-step explanation:

The ratio of the number of Kentucky's representatives to the total number of representatives is

... 6/435 = 2/145

7 0

2 years ago

A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx⎯ ⎯ x¯ = 840 and

gayaneshka [121]

Answer:

$(832.156, \ 847.844)$

Step-by-step explanation:

Given data :

Sample standard deviation, s = 15

Sample mean, $\overline x = 840$

n = 23

a). 98% confidence interval

$\overline x \pm t_{(n-1, \alpha /2)}. \frac{s}{\sqrt{n}}$

$$E= t_{( n-1, \alpha/2 )} \frac{s}{\sqrt n}}$

$t_{(n-1 , \alpha/2)} \frac{s}{\sqrt n}$

$t_{(n-1, a\pha/2)}=t_{(22,0.01)} = 2.508$

∴ $E = 2.508 \times \frac{15}{\sqrt{23}}$

$E = 7.844$

So, 98% CI is

$(\overline x - E, \overline x + E)$

$(840-7.844 , \ 840+7.844)$

$(832.156, \ 847.844)$

4 0

2 years ago

Can you help with this problem 5×-(14-×)=-30-2×

REY [17]

Answer:

-2

Step-by-step explanation:

First remove parenthesis. Next collect the like terms. Next move terms. Next collect the like terms and calculate. Divide both sides by 8. Your answer is -2