exam Maths Puzzle Numerical Ability

HELP!!!!

Rewrite the equation as a function of x

y=-7x-9

thanks a lot
Heather

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exam Other Question

Find the sum or difference. 4 5/9 - 3 2/15

Thanks! Please work really really really really fast! Happy Holidays! A chemist has one solution that is 40 percent pure glycoside and another solution that is 80 percent pure glycoside. How many pounds of each solution must be used to produce 100 pounds of a solution that is 60 percent glycoside?