Answer:
C) p + 3 < 20
Step-by-step explanation:
Since the max is 20, it has to be < 20
p + 3 < 20
Answer:
Step-by-step explanation:
Let's identify what we are looking for in terms of variables. Sandwiches are s and coffee is c. Casey buys 3 sandwiches, which is represented then by 3s, and 5 cups of coffee, which is represented by 5c. Those all put together on one bill comes to 26. So Casey's equation for his purchases is 3s + 5c = 26. Eric buys 4 sandwiches, 4s, and 2 cups of coffee, 2c, and his total purchase was 23. Eric's equation for his purchases then is 4s + 2c = 23. In order to solve for c, the cost of a cup of coffee, we need to multiply both of those bolded equations by some factor to eliminate the s's. The coefficients on the s terms are 4 and 3. 4 and 3 both go into 12 evenly, so we will multiply the first bolded equation by 4 and the second one by -3 so the s terms cancel out. 4[3s + 5c = 26] means that 12s + 20c = 104. Multiplying the second bolded equation by -3: -3[4s + 2c = 23] means that -12s - 6c = -69. The s terms cancel because 12s - 12s = 0s. We are left with a system of equations that just contain one unknown now, which is c, what we are looking to solve for. 20c = 104 and -6c = -69. Adding those together by the method of elimination (which is what we've been doing all this time), 14c = 35. That means that c = 2.5 and a cup of coffee is $2.50. There you go!
Everyone would get 0.66666666666666666 and so on
Answer:
The proof itself
Step-by-step explanation:
We can define the set of all even numbers as
This is, we can define all even numbers as the set of all the multiples of
As for the odd numbers, we can always take every even number and sum one to each one. This is
Note that (the set of all natural numbers adding the zero) so that for then
Now, given 2 odd numbers and we can write each one as follows:
And then if we multiply them with each other we obtain:
Then we have that is also an odd number as we defined them.
2(x-3)÷4=5-8+5
(x-3)/2 = -3 + 5
x - 3 = -6+ 10
x = 4 + 3
x = 7
first,we need to eliminate the fraction by simply it with 2.After that,bring 2 to the right hand side and multiply it.Solve untill u get value of x.