10)P is the point (a, a – 2) and Q is the point (4 – 3a, –a). a Find the gradient of the line PQ.
b Find the gradient of a line perpendicular to PQ.
Given that the distance PQ is 105, find the two possible values of a.
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It says factor each expression 49x-28?

If you can solve all of these i will give ! - 4% of 190 - 4% of 162.5 - 4% of 140 - a 4% increase from 155.1 - a 4% increase from 159.8

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)