Right triangles help please

19 . Given,

The price of each apple = $ 0.26

Let x be the number apples she bought,

So, the amount she spent = 0.26x dollars

According to the question,

0.26x = 10

⇒ x = = 38.46 ≈ 38,

Hence, she can buy 38 apples,

20. The price of each orange = $ 0.38,

Let y be the number of oranges she bought,

So, the amount she spent = 0.38x

Again according to the question,

0.38x = 10,

⇒ x = = 26.32 ≈ 26

Hence, she can bought 26 oranges,

21. If she bought b apples and a oranges,

Total spending amount = 0.38a + 0.26b

⇒ 0.38a + 0.26b = 10

if a = 1, 0.26b = 9 ⇒ b ≈ 35,

if a = 2, 0.26b = 8 ⇒ b ≈ 31

So, she can buy 1 orange 35 apples or 2 oranges 31 apples.