If we let Q be the number of quarters and N be number of nickels, this is the formula we would use:
[1] 25Q + 5N = 635 (using cents instead of dollars)
We also know something about Q and N.
[2] Q + N = 51
So multiply both sides of the second equation by 5. The reason we do this is because we're going to need to cancel out one of the variables (either Q or N) to solve for the other one. If we multiply times 5, we'll have 5N in both equations.
5Q + 5N = 255
Now we have two equations, and the second one can be subtracted from the first.
25Q + 5N = 635
-(5Q + 5N) = -255
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20Q = 380
so
Q = 19
There are 19 quarters.
And since there are 51 coins in all, 51-19 = 32 nickels.
Answer:
6
Step-by-step explanation:
Answer:
d. A five-hour bus trip is divided into six equal legs.
Step-by-step explanation:
hope it helps
The cows of Argentina needs an approximate area of 4200 m² for grazing, and there is a total of 4500 cows.
And we are asked to find the total area of their grazing but in hectares. So, we can write:
Then, for 4500 cows:
We know that, 1 hectares = 10000 m² = 10⁴ m²
Then let the area of the field be x in hectares:
Then, putting them in proportion, We will get:
So, the total area in hectares = <u>1</u><u>8</u><u>9</u><u>0</u><u> </u><u>hectares</u><u>.</u>
And we are done !!
#CarryOnLearning
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P = 4
13 + 3 = 16
16/4 = 4
These questions require reverse order, you have to work backwards
For example 4 * P you would do 4/P instead
