Answer:
3x=-y+12
2x+3y=-6
collecting the like terms we have
3x+y=12
2x+3y=-6
to solve this simultaneous equation, we use substitution method
we make y the subject in equation one:
y=12-3x
then we put y=12-3x into 2x-3y=-6 in equation two
2x+3(12-3x)=-6
2x+36-9x=-6
-7x+36=-6
-7x=-6-36
-7x=-42
x=-42÷-7
x=6
then we put x=6 in y=12-3x:
y=12-3x
y=12-3(6)
y=12-18
y=-6
Cdshjbgtz d grace to bring her home back oand is that
Answer:
1. 68%
2. 50%
3. 15/100
Step-by-step explanation:
Here, we want to use the empirical rule
1. % waiting between 15 and 25 minutes
From what we have in the question;
15 is 1 SD below the mean
25 is 1 SD above the mean
So practically, we want to calculate the percentage between;
1 SD below and above the mean
According to the empirical rule;
1 SD above the mean we have 34%
1 SD below, we have 34%
So between 1 SD below and above, we have
34 + 34 = 68%
2. Percentage above the mean
Mathematically, the percentage above the mean according to the empirical rule for the normal distribution is 50%
3. Probability that someone waits less than 5 minutes
Less than 5 minutes is 3 SD below the mean
That is 0.15% according to the empirical rule and the probability is 15/100
Dis·tri·bu·tion<span>ˌdistrəˈbyo͞oSH(ə)n/</span>nounthe action of sharing something out among a number of recipients."she had it printed for distribution among her friends"<span>synonyms:<span>giving out, dealing out, doling out, handing out/around, issue, issuing, dispensation; <span>More</span></span></span><span>the way in which something is shared out among a group or spread over an area."changes undergone by the area have affected the distribution of its wildlife"<span>synonyms:<span>dispersal, dissemination, spread; <span>More</span></span></span>the action or process of supplying goods to stores and other businesses that sell to consumers.</span>
Distribute the
And combine the s terms and you should be able to solve it
