Leonard it sells small watermelons for seven dollars each and large watermelons for $10 each one day the number of small waterme
1 answer:
He sold 32 small watermelons and 17 large watermelons.
Step-by-step explanation:
Let,
Small watermelons = x
Large watermelons = y
Cost of one small watermelon = $7
Cost of one large watermelon = $10
According to given statement;
x = y+15 Eqn 1
7x+10y=394 Eqn 2
Putting value of x from Eqn 1 in Eqn 2
Dividing both sides by 17
Putting y=17 in Eqn 1
He sold 32 small watermelons and 17 large watermelons.
Keywords: linear equations, substitution method
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take the inverse of both sides to get:
x = arccos(-2/3) now evaluate the right
x = 131.8103149 degrees
to find your second solution, subtract your reference angle from 360 degrees.
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Not sure if this is what you're looking for, but thought I would leave it here for you just in case... As a side note, you could do this problem in radian measurement as well.
x = arccos(-2/3) now evaluate the right
x = 131.8103149 degrees
to find your second solution, subtract your reference angle from 360 degrees.
360 - 131.8103149 = 228.1896851 degrees
Now the period of cos is 2π or 360 degrees. So if you want to consider all possible solutions, you would need to add/subtract 360n to both solutions above..
Not sure if this is what you're looking for, but thought I would leave it here for you just in case... As a side note, you could do this problem in radian measurement as well.