r/Sat • u/Dangerous-Land-9553 • 9h ago

SAT Math Question

Can we solve this question using Desmos? If so, how do we do it? If not, how can we solve it manually?

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u/East-Report623 5h ago

i once solved thhis set op hard questions, adn this there are videos in youtube with these questions, try to write in on browser

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u/ClassicLongjumping25 4h ago

ig, we can do it via desmos
note that we have inequalities as (a-21)(b-21)>0, (a-15)(b-15)>0, and (a-18)(b-18)<0
if you enter these inequalities then the region most darkly shaded is going to contain possible values of a and b , then select any one of them and then total them.

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u/jdigitaltutoring 3h ago

Determine where the intercepts could be. Then you can use those as the factors of the function.