Find the value of x! this is geometry

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?

Combine like terms to make a simpler expression 3z+z

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.