The ratio of boys to girls is 5:4. there are 64 girls in choir. how many boys are in choir? 1. 48
2.61
3.75
4.80

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7x+8y=-18, 4x-9y=-3 solve the system of equations

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil