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brainliest to first answer

Answer:
3/10
Step-by-step explanation:
-4y +b
Let y = 3/20 and b = 9/10
-4 ( 3/20) + 9/10
-12/20 + 9/10
Simplify the first term
-6/10 + 9/10
3/10
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Let's solve ~
[tex]\qquad \leadsto\sf \: - 4y + b[/tex]
[ plug the values of y and b ]
[tex]\qquad \leadsto\sf \: (- 4 \times \frac{3}{20} ) + \frac{9}{10} [/tex]
[tex]\qquad \leadsto\sf \: - \frac{3}{5} + \frac{9}{10} [/tex]
[tex]\qquad \leadsto\sf \: \frac{ - 6 + 9}{10} [/tex]
[tex]\qquad \leadsto\sf \: \frac{3}{10} [/tex]