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3 years ago

Which function has a restricted domain?

Mathematics

1 answer:

Ymorist [56]3 years ago

4 0

Answer:

d has domain pl like and follow and mark in brainliest answer

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Which graph represents the solution set of y = x2 + 4x + 3 and y = 2x + 6?

dybincka [34]

I hope this helps you x^2+4x+3=2x+6 x^2+2x-3 =0 x +3 x -1 (x+3)(x-1)=0 x+3=0 x= -3 x-1=0 x=1

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3 years ago

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Brett has a $60 online gift voucher.He plans to buy as many books as he can.Each book is $7.There is also a shipping charge of $

QveST [7]

Brett can buy 10 books with 60$

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3 years ago

The slope of this graph is?

AURORKA [14]

The slope of the graph is -1/2 using the rise over run method it rises up one and too the left twice so it would he -1/2

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3 years ago

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In January 2002, two students made worldwide headlines by spinning a Belgian euro 250 times and getting 140 heads—that’s 56%. Th

natita [175]

Answer with explanation:

The 90% confidence interval (51%, 61%) for proportion means that the proportion of getting heads lie in it.

Given : Total number of times coin is tossed = 250

Number of times they got head =140

The probability of getting a head = 0.56

The confidence interval for proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

Given significance level : $\alpha=1-0.90=0.1$

Critical value : $z_{\alpha/2}=z_{0.05}=\pm1.645$

Now, the 90% confidence interval for proportion will be :-

$0.56\pm (1.645)\sqrt{\dfrac{0.56(1-0.56)}{250}}\approx0.56\pm 0.0516\\\\=(0.56-0.0516,0.56+0.0516)=(0.5084,\ 0.6116)\approx(51\%,\ 61\%)$

Hence, the given confidence interval is correct.

6 0

3 years ago

A first order decomposition reaction has a half-life of 64yr. What percentage of the original amount is left after 135years. (gi

vlabodo [156]

Answer:

23.2%

Step-by-step explanation:

First we need to find how many half lives 135 years is:

135 ÷ 64 = 2.109375

Now we divide 100% by 2 to the power of the number of half lives. This is how you calculate the percentage of the original amount left. If you have the original mass, you can substitute that in instead of 100%:

100 ÷ $2^{2.109375}$ = 23.1747390635

To 1 decimal place it is 23.2%

4 0

3 years ago