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3 years ago

What does 100-55 equal.

Mathematics

2 answers:

Softa [21]3 years ago

5 0

Answer:

Step-by-step explanation:

Mice21 [21]3 years ago

5 0

Answer:

Step-by-step explanation:

so uh- if you can't do it right away you can try just thinking of it at 100-50 which is the same at 100/2 then so it's 50 but you have to subtract 55 so ull subtract 5 and it'll be 45...

sorry if it sounds weird, im not a teacher lol

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torisob [31]

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4 years ago

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3 years ago

Mario simplified the expression (4 z Superscript 8 Baseline) Superscript negative 3 as shown. (4 z Superscript 8 Baseline) Super

GREYUIT [131]

Answer:

Step-by-step explanation:

Given the expression $(4z^8)^{-3}$ , to evaluate this, we will use one of the law of indices as shown;

$(a^m)^n = a^{mn}$

$4^{-3} * z^{8*-3}$

$= \frac{1}{4^3} * z^{-24}\\ \\= \frac{1}{64} * \frac{1}{z^{24}}\\ \\= \frac{1}{64z^{24}}$

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3 years ago

Data were collected from a typing class with 45 students. The class had an average of 56 words per minute (WPM) with a standard

STALIN [3.7K]

Answer:

Standard deviation gets smaller

Step-by-step explanation:

No. of students = 45

The class had an average of 56 words per minute (WPM) with a standard deviation of 7 WPM.

$Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}\\56=\frac{Sum}{45}\\56 \times 45=Sum\\2520=Sum$

The teacher realized that the data from one student who typed 55 WPM was not entered.

So, new sum = 2520+55

New sum =2575

So, new mean = $\frac{2575}{45}$

New mean =57.22

Standard deviation is the measure of distance between observation and mean

So, if number gets closer to mean , Standard deviation gets smaller . if the numbers get bigger , Standard deviation gets bigger.

Since 55 is closer to 57.22

So, Standard deviation gets smaller

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3 years ago