Answer:
Brainliest pls C.
Step-by-step explanation:
He bought 4 books
Steps:
3.95(3) + 8.95b = 47.65
<span>11.85 + 8.95b = 47.65
</span>
Now just subtract 11.85 from both sides and now the equaton shoud look like this
8.95b = 35.8
Now divide 8.95 from both sides and you get...
b=4
Hope this helps!
Answer:
Option C. True
Step-by-step explanation:
The given sets are {51, 52, 51, 52} and {51, 52}
By the definition of equal sets says if two sets have the same elements, sets are called to be equal.
Cardinality of both the sets never affect the equality of the sets.
In the given sets number of elements are different but the elements are same.
Therefore, by the definition of the eqaulity both the sets are equal.
Option C. is the answer.
Answer:
21. d. 39
22. c. 20; 7
Step-by-step explanation:
21. This is straightforward evaluation of the function. Put the numbers 8 and -5 where x is in the function definition and do the arithmetic. Then find the difference of the results.
f(8) = 3·8 -2 = 22
f(-5) = 3·(-5) -2 = -17
f(8) - f(-5) = 22 - (-17) = 22 +17 = 39
__
22. The first part is similar to 21—evaluate the function for x=2.
f(2) = 24 -2·2 = 24 -4
f(2) = 20
Note that this result is sufficient to allow you to choose the correct answer.
However, we can also do the second part. Find x for f(x) = 10
f(x) = 24 -2x
10 = 24 - 2x . . . . . . substitute 10 for f(x)
-14 = -2x . . . . . . . . . subtract 24 from both sides
7 = x . . . . . . . . . . . . . divide both sides by -2
Answer:
11. f(x) =3x-5
put x = 4 as given in question
ie:
f(4)= 3(4)-5
=12-5
=7
