x-0.75=0.40 will determine the normal price of each cookie.
Step-by-step explanation:
Cost of 7 cookies = $2.80
Cost of one cookie =
Cost of one cookie = $0.40
Let,
x be the normal price of cookie
As the price today is $0.75 less than normal price, therefore,
x-0.75=0.40 will determine the normal price of each cookie.
Keywords: linear equation, subtraction
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144 meters
2 meters
1 meter
Answer:
25 and 15
You can easily make a system of equations:
x + y = 40
x - y = 10
Solving for x on equation 2 gets x = 10 + y.
Plugging in this into the first equation, you get 10 + y + y = 40
Thus, 10 + 2y = 40
y = 15.
Plugging this back into either equation gets x = 25.
A.15705.2
B.1570.52
C.157.052
D.15.7052