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2 years ago

I need help with this question it is on mathswatch btw.

Mathematics

1 answer:

navik [9.2K]2 years ago

4 0

Answer:

x is less then or equal to -3

x<-3 (the < has to have a line underneath)

Step-by-step explanation:

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If x = 3 cm and z = 5 cm, what is the length of y?

kherson [118]

Answer:

Step-by-step explanation:

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2 years ago

Simplify (5 x + 1) - (-10 x + 6)

tekilochka [14]

Answer:15x+7

Step-by-step explanation:

First you would see that the -(-10x+6) would turn into 10x+6 meaning that the whole equation would turn into 5x+1+10x+6. Then add the x numbers together and the whole numbers separate. So now your answer should be 15x+7

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2 years ago

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Is this a Percent Increase or Decrease Problem?

nydimaria [60]

Answer:

Percent Decrease

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2 years ago

~Factorise~ : x³ + 4x<br>with the steps

GrogVix [38]

Answer:

x (x^2+4)

Step-by-step explanation:

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3 years ago

Given the following winning percentages of the teams in a league (for a single year) compute the within-season standard deviatio

Masja [62]

Answer:

(b) 0.251

Step-by-step explanation:

1. Standard deviation equation:

$SD=\sqrt{\frac{\sum\limits^N_i {(x_{i}-X)^{2} } }{N} }$

Where X is the mean of the data, and N the amount of data. Then, N=5

2. Estimate the Mean:

$X=\frac{0.750+0.750+0.200+0.600+0.200}{5}=\frac{2.5}{5}=0.5\\$

3. Caclulate Standard deviation:

$SD=\sqrt{\frac{{(0.750-0.500)^{2}+(0.750-0.500)^{2}+(0.200-0.500)^{2}+(0.600-0.500)^{2}+(0.200-0.500)^{2} } }{5} }$

$SD=\sqrt{\frac{0.315}{5} }=\sqrt{0.063}\\SD=0.251$

7 0

2 years ago