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Math

Question Evaluate the expressions c−9c-9 for c=11c=11, b+16b+16 for b=4b=4, and a−4a-4 for a=ya=y.

Studdy Solution

STEP 1

Assumptions
1. We are given expressions with variables and the values of those variables.
2. We need to substitute the given values into the expressions and simplify.

STEP 2

For problem 7, we have the expression c−9c - 9 and the value for cc is given as 11. We will substitute the value of cc into the expression and simplify.
c−9c - 9

STEP 3

Substitute c=11c = 11 into the expression.
11−911 - 9

STEP 4

Calculate the result.
11−9=211 - 9 = 2
So, for c=11c = 11, the expression c−9c - 9 equals 2.

STEP 5

For problem 8, we have the expression b+16b + 16 and the value for bb is given as 4. We will substitute the value of bb into the expression and simplify.
b+16b + 16

STEP 6

Substitute b=4b = 4 into the expression.
4+164 + 16

STEP 7

Calculate the result.
4+16=204 + 16 = 20
So, for b=4b = 4, the expression b+16b + 16 equals 20.

STEP 8

For problem 9, we have the expression a−4a - 4 and it is given that a=ya = y. We will substitute aa with yy in the expression.
a−4a - 4

STEP 9

Substitute a=ya = y into the expression.
y−4y - 4
Since we are not given a specific value for yy, the expression simplifies to y−4y - 4.
The solutions are:
7. For c=11c = 11, c−9=2c - 9 = 2.
8. For b=4b = 4, b+16=20b + 16 = 20.
9. For a=ya = y, a−4=y−4a - 4 = y - 4.

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