Answer:
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 = [tex]\frac{10}{0.26}[/tex] = 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 = [tex]\frac{10}{0.38}[/tex] = 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.
