Answer:
You do not need to get right just get one wrong and it will say demo, then keep doing that.
Step-by-step explanation:
<span>First you need to find the mean on these numbers that is step one in finding standard deviation. so this is 44.2. now you need to subtract the mean from each number and square the result. after that step you now have these numbers.... 3.24, 139.24, .64, .4,.64,282.24,116.64,77.44,27.04. now the next step is to find the mean of these numbers. you get 71.9 appx.. now all you do is square root this number you get 8.5 when you round to the nearest thenth</span>
-x+4(x+3) = 9
Multiplying...
-x+4x+12=9
So,
3x + 12 = 9
Now, subtract 12 from both sides.
3x + 12 - 12 = 9 - 12
3x = -3
Then, divide by 3.
3x/3 = -3/3
x = -1
Answer:
2,1
Step-by-step explanation:
y=-3x+7
y=-3(2)+7
y=-6+7
y=1
so (2,1)
Answer:
She is incorrect
Step-by-step explanation:
Given:
2x and -x
Required
Like term or not?
Like terms are determined by the term itself and not by their coefficients;
Take for instance;
and are not like terms because a term has square while the other doesn't
Another instance;
and are like terms because they both have the presence of just 1 x
In Marianna's case;
2x and -x are like terms;
Reason being that: -x can be rewritten as -1x; giving it a coefficient of -1