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2 years ago

Halp me plz now I need to go to school Now

Mathematics

1 answer:

ANEK [815]2 years ago

3 0

11.) All you've got to do is subtract thirty-eight(38) from eighty-one(81). This will result in 43.

81-38=43

12.) You've got to subtract eighty-seven(87) from ninety(90) which will give you the answer 3.

87-90=3

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Simplify. Write your answer using whole numbers and variables.

Andre45 [30]

Answer:

q + 7

Step-by-step explanation:

(q² + 4q − 21) / (q − 3)

Factor the numerator:

(q + 7) (q − 3) / (q − 3)

Divide:

q + 7

5 0

3 years ago

Why is -9an acceptable answer to the equation x2=81 ?

Arte-miy333 [17]

Answer:

X=9 or x=-9

Step-by-step explanation:

X^2=81

Can be written as

x^2-81=0

Factorize by the property:

a^2-b^2=(a-b)(a+b)

So the expression becomes:

(x-9)(x+9)=0

Therefore, either x-9=0or x+9=0

Then the solutions are x=9 or x=-9

8 0

3 years ago

Read 2 more answers

Why do new cars costing $20,000 rent for $40 a day, while tuxedos costing only $500 rent for around $90?

REY [17]

You use cars for much longer than you use a tuxedo. A tuxedo is once-off, whereas cars you use for days and days and days... After a while, the <span>$</span>20 you pay per day is going to add up!

5 0

3 years ago

Andrea sells photographs at art fairs. She prices the photos according to size: small photos cost $10, medium photos cost $15, a

Talja [164]

Answer: she must sell 6 large photos and 6 small photos

Step-by-step explanation: and how I knew that is I multiplied 6 40 times and that gives you 240 and if you multiply 6 ten times that gives you 60 so 240 plus 60 is $300

4 0

1 year ago

The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The d

Colt1911 [192]

Answer: 34%

Step-by-step explanation:

According to the Empirical rule,

About 68% of the population lies with in one standard deviation from the mean.

i.e. About 34% of the population lies above one standard deviation from the mean .

and About 34% of the population lies below one standard deviation from the mean.

Given : The distribution of the number of daily requests is bell-shaped ( i.e. Normally distribution) and has a mean of 60 and a standard deviation of 11.

i.e. $\mu=60\ \ \sigma=11$

Using the Empirical Rule rule, 34% of the population of lightbulb replacement requests lies above one standard deviation from the mean .

i.e. About 34% of the population of lightbulb replacement requests lies between $\mu$ and $\mu+\sigma$

i.e. About 34% of the population of lightbulb replacement requests lies between $60$ and $60+11$

i.e. About 34% of the population of lightbulb replacement requests lies between 60 and 71

Hence, the approximate percentage of lightbulb replacement requests numbering between 60 and 71 = 34%

4 0

2 years ago