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3 years ago

What is the additive inverse of ?

1 answer:

8 0

In mathematics, the additive inverse of a number a is the number that, when added to a yields zero. This operation is also known as the opposite (number), sign change, and negation. ... For example, the additive inverse of 7 is −7, because 7 + (−7) = 0, and the additive inverse of −0.3 is 0.3, because −0.3 + 0.3 = 0 .

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Find the value of x 140° 80° 5 X°

evablogger [386]

2.44346x is 140 80 is 1.39626 5x is is an incomplete math problem

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3 years ago

HELP ME ASAP I HAVE SO MANY QUESTIONS THAT WILL SAY THIS BUT HELP MEEE!!!(timed!!)

tester [92]

Answer:

1. $8.30

Step-by-step explanation:

so 3 hats were purchased and each cost 15.50 so

15.50*3=46.50

and the rest of the 96.30 is 6 keychains so

96.30-46.50=49.80

and there is 6 keychains

49.80/6=8.30

Each key chain was $8.30

Claire's answer is unreasonable because when we got the price of the keychains all together in Claire's mind the total for the keychains would be $4.98, which we clearly got the total for the keychains at $49.80.

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2 years ago

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We would like to estimate the proportion of UF students who owns a scooter to within 1% of the truth, with 95% confidence. We do

professor190 [17]

Answer:

Option A) 9604

Step-by-step explanation:

We are given the following in the question:

Confidence level = 95%

Standard error = 1%

$p = q = 0.5$

Formula for sample size:

$n = (z_{stat}\times \dfrac{p(1-p)}{\text{Standard error}})^2$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting values, we get,

$n = (1.96\times \dfrac{0.5(1-0.5)}{0.01})^2 = 9604$

Thus, the sample size must be

Option A) 9604

8 0

2 years ago

Expand and simplify:

Allisa [31]

$1.\\(n-2)(3n+7)+2n(2n+3)\\\\=n\cdot3n+n\cdot7-2\cdot3n-2\cdot7+2n\cdot2n+2n\cdot3\\\\=3n^2+7n-6n-14+4n^2+6n\\\\=7n^2+7n-14$

==============================================================

$2.\\4x^2-25=(2x)^2-5^2=(2x-5)(2x+5)$

5 0

3 years ago

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Wacky Wizards offers beginner Advanced magic classes. the beginner costs 6 more than half the cost of the advanced class. Last w

Vikki [24]

Answer:

Step-by-step explanation:

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3 years ago

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