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3 years ago

200 students attend Ridgewood Junior High School. 20% of students bring their

Mathematics

1 answer:

Mademuasel [1]3 years ago

7 0

Answer:

200 × 20/100 = 40

Remember 20% is 20/100 or 0.2

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Mr. Thompson's sixth-grade class is competing in the school field day. There are 16 boys and 12 girls in his class. He divided t

slamgirl [31]

There are 3 girls on each team and 4 boys on each team.

4 0

4 years ago

Please could someone help me ?

Juliette [100K]

Answer:

50% of 1/3: 1/2 x 1/3 = 1/6

75% of 1/2: 3/4 x 1/2 = 3/8

Step-by-step explanation:

50% = 1/2

50% of 1/3: 1/2 x 1/3 = 1/6

75% of 1/2: 3/4 x 1/2 = 3/8

6 0

3 years ago

nathan smiled at 50 people one day and recorded that 36 people smiled back at him.Based on his observations how many people shou

Olegator [25]

Given :

Nathan smiled at 50 people one day and recorded that 36 people smiled back at him.

To Find :

How many people should Nathan expect to return a smile if he smiles at 650 people over a period of time.

Solution :

Ratio of people smiled by total number of people is :

$R = \dfrac{36}{50}$

Now, it is given that we have to use the given conditions.

Therefore, ratio will be same :

$\dfrac{s}{650}=\dfrac{36}{50}\\\\s = \dfrac{36}{50}\times 650\\\\s = 468$

Therefore, number of smiles Nathan expect to return is 468.

4 0

3 years ago

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 445445 gram setting. Is

marusya05 [52]

Answer:

Yes there is sufficient evidence.

Null hypothesis; H_o ; μ = 445

Alternative hypothesis; H_o ; μ ≠ 445

Step-by-step explanation:

The null hypothesis states that there is no difference in the test which is denoted by H_o. However, the sign of null hypothesis is denoted by the signs of = or ≥ or ≤.

Meanwhile, the alternative hypothesis is one that defers from the null hypothesis. This therefore implies a significant difference in the test. Thus, the signs of alternative hypothesis is denoted by; < or > or ≠.

Now, the question we have is a two tailed test. Thus;

The null hypothesis is;

bag filling machine works correctly at the 445 gram setting which is;

H_o ; μ = 445

The alternative hypothesis is;

bag filling machine works incorrectly at the 445 gram setting which is;

H_o ; μ ≠ 445

8 0

4 years ago

Determine the domain of the function, and then graph it.

Tomtit [17]

First set change the function f(x) to y so
that it would be
$y = \sqrt{x + 4} - 1$
Then set y = 0
$0 = \sqrt{x + 4} - 1$
Then solve for x

X = - 3

To graph it, just plot the point (-3,0) on the x-axis

6 0

3 years ago