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Pavlova-9 [17]
3 years ago
11

I need help. Please im not very good at math

Mathematics
2 answers:
timofeeve [1]3 years ago
6 0

Answer:

sure i can help im really good at algebra :D

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

tankabanditka [31]3 years ago
3 0

Answer:

i help youUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

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A nutrition laboratory wants to construct a 95% confidence interval for the mean sodium content of "reduced sodium" hot dogs. A
tatuchka [14]

Answer:

n > 96

Therefore, the number of samples should be more than 96 for the width of their confidence interval to be no more than 10mg

Step-by-step explanation:

Given;

Standard deviation r= 25mg

Width of confidence interval w= 10mg

Confidence interval of 95%

Margin of error E = w/2 = 10mg/2 = 5mg

Z at 95% = 1.96

Margin of error E = Z(r/√n)

n = (Z×r/E)^2

n = (1.96 × 25/5)^2

n = (9.8)^2

n = 96.04

n > 96

Therefore, the number of samples should be more than 96 for the width of their confidence interval to be no more than 10mg

6 0
3 years ago
Help and explain explain !!!!!!!!!!
tigry1 [53]

Answer:

x=-1\text{ or }x=11

Step-by-step explanation:

For a=|b|, we have two cases:

\begin{cases}a=b,\\a=-b\end{cases}

Therefore, for 18=|15-3x|, we have the following cases:

\begin{cases}18=15-3x,\\18=-(15-3x)\end{cases}

Solving, we have:

\begin{cases}18=15-3x, -3x=3, x=\boxed{-1},\\18=-(15-3x), 18=-15+3x, 33=3x, x=\boxed{11}\end{cases}.

Therefore,

\implies \boxed{x=-1\text{ or }x=11}

3 0
2 years ago
Sadie was using a metal spoon to eat her soup and her spoon became hot. Which correctly describes the process that caused the sp
IrinaK [193]

Answer:

The answer is D metal is a connductor that is why many of our hot appliances such as grills, ovens, and hot iron tools are metal

Step-by-step explanation:

brainlest plz

6 0
2 years ago
Read 2 more answers
WILL GET BRAINLIEST RIGHT AWAY!!!!! NEED BY TODAY!!!
ExtremeBDS [4]

Answer:

D. I and IV

Step-by-step explanation:

53 is the opposite of -53.

The absolute value of 53 is 53.

<h2><u><em>Please mark as Brainliest!!!</em></u></h2>
6 0
3 years ago
Henry ran five races, each of which was a different positive integer number of
dolphi86 [110]

Answer:

10 miles.

Step-by-step explanation:

Let x be the number of miles on Henry's longest race.

We have been given that Henry ran five races, each of which was a different positive integer number of  miles.

We can set an equation for the average of races as:

\frac{\text{The sum distances of 5 races}}{5}=4

As distance covered in each race is a different positive integer, so let his first four races be 1, 2, 3, 4.

Now let us substitute the distances of 5 races as:

\frac{1+2+3+4+x}{5}=4

\frac{10+x}{5}=4

Let us multiply both sides of our equation by 5.

\frac{10+x}{5}*5=4*5

10+x=20

Let us subtract 10 from both sides of our equation.

10-10+x=20-10

x=10

Therefore, the maximum possible distance of Henry's longest race is 10 miles.

7 0
2 years ago
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