how do I solve subtract 19 from My number and mulitply the difference by -4 , the result is -44 What is Sara number

Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in

Can somebody me out with this question

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7