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Evaluate the following algebraic expressions:
1. 2x - 3 when x = 1.5
2. 10x +7 - 2 when x=5
Hint:
A number in front of a variable means to multiply
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Respuesta :

Answer:

1. 0

2. 55

Step-by-step explanation:

For expression one:

[tex]2x - 3\\2(1.5)-3 \leftarrow \text {Replace x with 1.5}\\2*1.5= 3 \leftarrow \text {Multiply 2 by 1.5}\\3-3\\\boxed{0} \leftarrow \text{Subtract 3 from 3.}[/tex]

For expression two:

[tex]10x +7 - 2\\10(5)+7-2 \leftarrow \text {Replace x with 5}\\10*5=50 \leftarrow \text {Multiply 10 by 5}\\50+7-2\\57-2 \leftarrow \text{Add 50 and 7}\\\boxed {55} \leftarrow \text {Subtract 2 from 57}[/tex]

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