Plz can you help me out with this question..

86%

Step-by-step explanation:

The mean is calculated as

mean =

The sum for the class is calculated as

= 70 ( multiply both sides by 30 )

sum = 2100

The sum of the 20 boys is

= 62 ( multiply both sides by 20 )

sum = 1240

The sum for the 10 girls is therefore 2100 - 1240 = 860

Thus the mean mark for the girls is

mean = = 86%

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5