Question

Evaluate each expression for the given value of the variable. 15. x+3x+7x for x=-5 16. 5p+10 for p=78 17. 2a-8a for a=12 18. 3n-3 for n=16

Answer 1

The resulting values of the expressions x+3x+7x, 5p+10, 2a-8a, and 3n-3, for given variable values x=-5, p=78, a=12, and n=16 respectively are -55, 400, -72, and 45.

Step-by-step explanation:

To evaluate the given expressions for the specified values of the variables, you simply need to substitute the given value into the expression and perform the arithmetic operations.

1. The expression x+3x+7x becomes -5+3(-5)+7(-5)=-5-15-35=-55 when x=-5.
2. 5p+10 = 5(78)+10 = 390+10=400 for p=78.
3. The expression 2a-8a simplifies to 2(12)-8(12)=24-96=-72 for a=12
4. And, 3n-3=3(16)-3=48-3=45 for n=16

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