Answer: there needs to be more infomation
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!
Answer:
B
Step-by-step explanation:
You can see from the sequence 26, 44, 62, 80,.... that each term after the first is 18 larger than the previous term.
<u>The first 4 seconds' distance is given</u>, so
- 5th second distance is 80+18=98
- 6th second distance is 98+18=116
- 7th second distance is 116+18=134
To find total distance for 7 seconds, we add up all the individual distances:
26+44+62+80+98+116+134=560
Answer choice B is right.
Answer:
The Third one
Step-by-step explanation:
Because -64/33 == -1 31/33
75% of 60
OF MEANS times
75/100 * 60
180/4
45
the answer is 45
