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3 years ago

if you make $300 and you spend $237 and then you make $40 more and spend $60 how much money do you have left?

Mathematics

1 answer:

AleksandrR [38]3 years ago

8 0

The answer would be $43.
Hope this helps:)

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I need with absolute value.

Amanda [17]

What do u need the absolute value on?

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3 years ago

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Help me find the value of X

RideAnS [48]

Answer:

B. x = 53 degrees.

Step-by-step explanation:

The external angles of all polygons add up to 360 degrees, so:

x + 120 + 90+ 97 = 360

x = 360 - 90 - 120 - 97

x = 53 degrees.

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3 years ago

A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours. To test this claim,

natka813 [3]

Answer: C. 12.5

Step-by-step explanation:

Given : A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours.

Population mean : $\mu=4000$

Sample size : n= 100

Sample mean : $\overline[x}=4500$

Standard deviation: $s=400$

The value of test-statistic is given by :-

$z=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}\\\\\Rightarrow\ z=\dfrac{4500-4000}{\dfrac{400}{\sqrt{100}}}\\\\\Rightarrow\ z= 12.5$

Hence, the value of the test statistic for this problem is 12.5.

5 0

3 years ago

Thirty percent of the people refused to work and just sat around. if 1400 people worked, how many just sat around?

Nezavi [6.7K]

30% can also be written as .3, which is easier to use in this case.

To find how many just sat around, multiply the number of people by the percentage of how many just sat around.

1400*.3=420

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3 years ago

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What is a formula for the nth term of the given sequence?<br> 20,50, 125...

loris [4]

Answer:

a(n) = 20*2.5^(n - 1)

Step-by-step explanation:

Note that 50 is 2.5 times 20, and that 125 is 2.5 times 50. Thus the common factor is 2.5. The formula for the nth term is

a(n) = a(1)*r^(n - 1) => a(n) = 20*2.5^(n - 1)

3 0

3 years ago