All categories

3 years ago

Does every number have a decimal expansion? yes or no

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

5 0

I’m pretty sure the answer is no

You might be interested in

Sum10and product of 9

AVprozaik [17]

Answer:

$x+ y = 10 ---(1)\\ x\cdot y = 9 ---(2)\\\\from(2) \ y = \frac{9}{x}\\\\substitute \ y \ in (1) \\x + \frac{9}{x} = 10\\\\x^2 + 9 - 10x = 0\\x^2 -10x + 9 = 0\\x^2 -9x -x +9 = 0\\x(x-9)-1(x-9)=0\\(x-1)(x-9)=0\\x = 1 \ or \ 9\\$

substitute x in y = 9/x

=> y = 9 or 1

So the number are 1 and 9 or 9 and 1

6 0

3 years ago

Determine each unit price to the nearest cent. Which deal gives the lowest unit price. Show your thinking.

Morgarella [4.7K]

You would do 12 divided by 25 which equals 0.48 and keep on doing that the next one is 0.52 and last is 0.53 meaning the best is the 12 muffins

8 0

3 years ago

Read 2 more answers

Ms. Delgado wants to purchase a new home valued at $141,000.

DedPeter [7]

141,000 x .523 = 73,743

5 0

3 years ago

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER PLS GIVE ME A STEP BY STEP EXPLANATION!!

Vanyuwa [196]

Answer:

I'm not so sure but i guess it's option D y=5x-3

the question said that the number of box of nails are purchased depending on how many houses they planned to build. so for knowing the boxes of nails they need to purchase they need to subtract the boxes which were left and the boxes we need now

7 0

3 years ago

Suppose a set of test scores is appproximately bell-shaped, with a mean of 68 and a range of 54. (a) The minimum test score is a

liberstina [14]

Answer:

a.) Minimum test score = 41

Maximum test score = 95

b.)An approximate value of the standard deviation is 9.

Step-by-step explanation:

The given set of test scores is approximately bell shaped.

The mean of the test scores, $\mu$ = 68

The range of the data set = 54.

a.) i.) Minimum test score = $\mu - \frac{range}{2} = 68 - \frac{54}{2} = 68 - 27 = 41$

ii.) The maximum test score = $\mu + \frac{range}{2} = 68 + \frac{54}{2} = 68 + 27 = 95$

b.) From the 68-95-99.7 rule, also known as the Empirical rule, tell us that an approximation of the range is 3 standard deviations either way from the mean. So from this rule we can say that the minimum can also be found from $\mu - 3\sigma$ and the maximum can also be approximated as $\mu + 3\sigma$ .

From the above we can say that the range can be written as

$3\sigma - (-3\sigma) = range$

∴ $6\sigma = range$

∴ $\sigma = \frac{range }{6} = \frac{54}{6} = 9$

Therefore an approximate value of the standard deviation is 9.

7 0

3 years ago