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3 years ago

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ITS 8TH GRADE SCIENCE HELP: Consider this problem statement, "Does the amount of salt in water affect the rate of freezing?" Ide

ntify the best graph that will show your data best.
1)scatter plot
2)bar graph
3)line graph

1 answer:

vova2212 [387]3 years ago

6 0

I think it’s line graph but I think I’m completely wrong-

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The Stomping Elephants volleyball team plays 30 matches in a week-long tournament. On average, they win 4 out of every 6 matches

8_murik_8 [283]

Answer:

The mean for the number of matches that they win in the tournament is 20.

Step-by-step explanation:

For each match, there are only two possible outcomes. Either they win, or they do not. The probability of winning a match is independent from other matches. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The Stomping Elephants volleyball team plays 30 matches in a week-long tournament.

This means that $n = 30$

On average, they win 4 out of every 6 matches.

This means that $p = \frac{4}{6} = \frac{2}{3}$

What is the mean for the number of matches that they win in the tournament?

$E(X) = np = 30\frac{2}{3} = 20$

The mean for the number of matches that they win in the tournament is 20.

8 0

2 years ago

Rachel earned $34 in 4 hours at her job today. She wants to know how much she could earn tomorrow if she works 12 hours at the s

Nutka1998 [239]

Answer:

34/4 = 8.5 dollars per hr

12 x 8.5 = 102

Answer: $102

Step-by-step explanation:

First step: find the unit rate (how much she earns per hour )

34/4 = 8.5

Next: Find how much she wants to work for

Then: Create the equation.

12 x 8.5

Last: multiply 12 and 8.5 and you should get your answer of 102 dollars

REMEMBER TO ADD THE DOLLAR SIGN

5 0

3 years ago

Read 2 more answers

The pottery class has 15 pounds of clay. Each student got 1/3 pound of clay to make a plate. How many plates did the students ma

wolverine [178]

15÷1/3= 45 so the students made 45 clay plates

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3 years ago

Can someone please help me!!! ASAP!! SOS!!!.... =( find the following using the given polygon

Phantasy [73]

Answer:
n = 6
a = 6 mm
r = 5.19615 mm
R = 6 mm
A = 93.53 mm2 times $3 = $280.59
P = 36 mm
x = 120 °
y = 60 °

r = inradius (apothem)
R = circumradius
a = side length
n = number of sides
x = interior angle
y = exterior angle
A = area
P = perimeter
π = pi = 3.14159...
√ = square root

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3 years ago

What is the range of the function f(x) = -(x + 3)2 + 7?

IrinaK [193]

Answer: b

Step-by-step explanation:

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3 years ago