Respuesta :

misazzahro

Answer:

subtitute the value of x and y to the expression.

Step-by-step explanation:

21.

[tex]4 {x}^{2} + 30y = 4 \times {7}^{2} + 30 \times 2[/tex]

[tex] = 196 + 60 = 256[/tex]

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