A certain elevator can support 20 adults or 24 children. Knowing that there are already 15 adults in this elevator, the number of children that can still enter is

Let's solve this question using the concept of ratios and proportions. The statement informs us that the elevator can support 20 adults or 24 children. Therefore, we can write the ratio between adults and children as: A/20 = C/24, where A represents the number of adults and C the number of children. We know that there are already 15 adults in the elevator, so we substitute the value of A in the equation: 15/20 = C/24. At this point, we need to solve the equation for C. To do this, we first simplify the fraction 15/20, which is equivalent to 3/4: 3/4 = C/24. Now, to isolate C, we multiply both sides of the equation by 24: (3/4) * 24 = C. We multiply the numerator and denominator by 6 (since 4 * 6 = 24): 3 * 6 = C. 18 = C. This tells us that if there were only adults in the elevator, the capacity would be 18 children. However, since the elevator already has 15 adults, we need to calculate the difference between the total capacity of adults (20) and the current quantity (15): 20 - 15 = 5. Now we know that there is still space for 5 adults in the elevator. To find out how many children can still enter, we use the initial proportion: A/20 = C/24. We substitute A with 5: 5/20 = C/24. We simplify the fraction 5/20 to 1/4: 1/4 = C/24. We multiply both sides of the equation by 24: (1/4) * 24 = C. 1 * 6 = C. 6 = C. Therefore, it is still possible to accommodate 6 children in the elevator. The correct answer is "6".

In a cake recipe, to make half of the indicated quantity, what is the proportion of ingredients that should be used?

It is known that a certain elevator at Shopping Via Sul can carry 12 adults or 18 unaccompanied children. On a particular Sunday, this elevator, going down, stopped on the 4th floor with 8 adults inside. Knowing that, on the floor, several children were waiting to go down and that no one got off on that floor, the maximum number of children that can still enter the elevator is:

A package contains 3/5 of a liter of juice. If I need 4.2 liters of juice, the number of packages I should buy is

João bought 3 candy packs for R$ 6.00. If he wanted to buy 2 more candy packs, how much would he spend?

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