Please help me! 20 points! You don't have to graph btw! This is my final question! [Inequalities Review]

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²