Solve the following systems of equations by elimination. Verify the solution: A. r+2s+1=0 and r+5s+25=0
B. 4m-3n=27 and 8m-6n=18
C. 0.6x=1.2+0.3y and 2.2x-1.8y-1.6=0

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr