(2.5x-9)+6x=-7 4(x-2)+x=-13

21=6-x-4x

and 5-11x=7(5-2x)

plz help fast

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue

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