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Please help! i will give brainliest and extra points if you answer correctly, thank you. (2)

Please Help I Will Give Brainliest And Extra Points If You Answer Correctly Thank You 2 class=

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Answer:

7. 15x+25y

15(5)+25(4)

75+100

=175

8. 3.5c+4m+2.5d

3.5(10)+4(6)+2.5(12)

35+24+30

=89

9. x²-2xy+y²

(-3)²-2(-3)(2)+(2)²

9+12+4

=25

10. 5x²-4xy+3y²

5(1)²-4(1)(-4)+3(-4)²

5+16+48

=69

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