Question

Substitute d = -2 and f = -5 into the expression 7d-2f+9.Please show workings.
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Answer 1

-15

Explanation:

If D = -2, then the equation is

7(-2)-2f+9.

If F = -5, then the equation is

7(-2)-2(-5)+9.

Multiply 7 and -2. = -14

Multiply 2 and -5 = -10

Now, the equation is -14-10+9.

-10 + 9 = -1.

Now we have -14-1, which is -15