How to solve k(a)=4a + 2: find k(a-3)

Mathematics

2 answers:

hichkok12 [17]4 years ago

8 0

K(a)=4(-3)+2

K(a)=-12+2

K(a)=-9

uysha [10]4 years ago

6 0

If you meant to say k=(-3)

First thing you would do is plug in the (-3) to a

Your equations would look like this:

k(a) = 4(-3) + 2

You would multiply 4 × -3, giving you -12.

k(a) = 12 + 2

Then you would add 12 + 2, giving you 14.

k(a) = 14

k(a) would equal 14.

You might be interested in

Which function rule describes the pattern in the table?

lakkis [162]

The correct answer is B.

In order to prove which of the function rules provided is the one corresponding to the schedule represented by the table, the different y-values need to be sustituted in the function rules. Only the correct function rule will yield the corresponding x-value.

Let's prove that option B is the correct one

FUNCTION B y= 5x - 14

If x= -4 --> substituting: 5(-4) - 14= -20 - 14= -34 therefore, y= -34 CORRECT
If x= -1 --> 5(-1)-14 = -5 - 14= -19 therefore y= -19 CORRECT
If x= 2 --> 5(2) - 14= 10-14= -4, therefore y= -4 CORRECT
If x= 4 --> 5(4)-14= 20-14= 6, therefore y=6 CORRECT
If x= 7 --> 5(7) -14= 35-14= 21, therefore y=21 CORRECT