A = 1/2 b h where A = 10 b = 4 and h = x + 3
so
h = 2A/b
h = 2*10 / 4
h = 20/4
h = 5
h = x + 3
5 = x + 3
x = 2
Answer
x = 2
First you should write 2 3/4 as a decimal, 2.75 then multiply 2.75 by 2 to get 5.5. 5.5 equals 5 1/2.
Ms. Addison needs 5 1/2 cups of flour.
