4 difference, subtract 20 point - 1st point, =19, 19 places x difference of 4= 76 more or less than 36. More would be 112, less would be -40.
A and C are both 40 while choice B = the difference so I'd say it's supposed to be 1 of the 40's but it's missing the negative sign
The answer is $3.21.
To find the answer, divide the total cost by the number of sq ft to get the price per sq ft.
15. 2x-5=-20
2x=-15; Add positive 5 on both sides to isolate x.
x=; Divide 2 on both sides to find the value of x.
17. =-9
9x=-36; Multiply positive 4 on both sides of the equation.
x==-4; Divide 9 on both sides of the equation to find the value of x.
For 7th one : (- 0.2)
For 8th one : + or - (0.9)
6.total bum of student=8+5=13
Ratio =5/13