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3 years ago

PLEASE HELP According to the stem-and-leaf plot above, how many students scored a

Mathematics

1 answer:

Anna71 [15]3 years ago

8 0

Answer:

Step-by-step explanation:

Do you even know what a stem-leaf plot is?

The scores lower than 80% are:

70, 70, 71, 78, 62, 62, 63, 68, 69, 69, 57, 57, 58, 49, 49, 30, and 21 percent according to the data given. That is 17 scores less than 80 percent.

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the length of a rectangle is 5 units longer than its width. If the perimeter must be at least 34 units, what are the possible le

ololo11 [35]

Answer:

w ≥ 6

l ≥ 11

Step-by-step explanation:

The perimeter of a rectangle is equal to P = 2l+2w where l=length and w=width. Here the length is 5 feet longer than the width or 5+w. This means the width is w. Substitute P = 34, l=5+w and w into the perimeter equation. Then solve for w.

34 ≤ 2*(5+w) + 2w

34 ≤ 10+2w+2w

34 ≤ 10+4w

24 ≤ 4w

6 ≤ w

This means the width must be at least 6 so the solution is w ≥ 6.

To find the length substitute 6 into l ≤ 5+w.

l ≤ 5 + 6

l ≤ 11

The length is l ≥ 11.

6 0

4 years ago

I NEED HELPPPP PLEASE

denpristay [2]

Plug them in then solve from left to light

3 0

4 years ago

Read 2 more answers

Translate this inequality as SENTENCE :- x + 5 ≥ 10 <br>

Scorpion4ik [409]

Answer:

A number plus 5 is greater then or equal to 10.

3 0

2 years ago

Read 2 more answers

What is 70/10 equivalent fraction?

kaheart [24]

The answer is 7 because 70 ÷ 10 = 7.

6 0

3 years ago

Last year, a person wrote 126 checks. Let the random variable x represent the number of checks he wrote in one day, and assume

Arisa [49]

Answer: The mean number of checks written per day $=0.3452$

Standard deviation $=0.5875$

Variance $=0.3452$

Step-by-step explanation:

Given : The total number of checks wrote by person in a year = 126

Assume that the year is not a leap year.

Then 1 year = 365 days

Let the random variable x represent the number of checks he wrote in one day.

Then , the mean number of checks wrote by person each days id=s given by :-

$\lambda=\dfrac{126}{365}\approx0.3452$

Since , the distribution is Poisson distribution , then the variance must equal to the mean value i.e. $\sigma^2=\lambda=0.3452$

Standard deviation : $\sigma=\sqrt{0.3452}=0.5875372328\approx0.5875$

6 0

3 years ago