Elizabeth got these grades on three tests: 72, 80 and 82. She had one more test to take. She wanted an average of 80 for the four tests. What score must she get on the fourth test?

82

Step-by-step explanation:

72+80+82= 234

234/3=78

78+82=160

154/2=80

she at least needs an 87 for her average to be an 80

Step-by-step explanation:

87+72+80+82=321

321/4= 80.25

step-by-step explanation:

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3