-12(x+5)=144
(use distributive property) -12x+ (-60)=144
+60 +60
-12x=204
-204 -204
-12x-204=0
+12x +12x
-204=12x
-204/12 12x/12
-17=x
x=-17
Average reading score is given by the expression,
y = 0.153x + 255.4
Here, x in the number of years past 1970.
To find the year in which the average reading score is 259.378, substitute the value of 'y' in the given expression.
y = 0.153x + 255.4
259.378 = 0.153(x) + 255.4
0.153x = 259.378 - 255.4
0.153x = 3.978
x =
x = 26
That means given average reading score 259.378 will be 26 years after 1970.
Therefore, 1996 is the year in which the average reading score will be 259.378.
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Answer:
Step-by-step explanation:
Assuming that you need to simplify the expression, below is the explanation to do it.
Given the following expression:
You need to decompose the radicand (The number inside the square root) into its prime factors:
Knowing that, you can rewrite the expression in this form:
Since , you must substitute it into the expression:
Now you need to remember the following property:
Then, applying that property, you get:i:
Finally, you must divide the numerator and the denominator by 3. So, you get: