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Tems11 [23]
3 years ago
6

Which order does it go?

Mathematics
1 answer:
gladu [14]3 years ago
4 0
Subtract 4 from each side
Divide both sides by 5
Take square root of both sides
Add 3 to both sides
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Casey can buy 3 sandwiches and 5 cups of coffee for $26. Eric can buy 4 sandwiches and 2 cups of coffee for $23. How much does o
dolphi86 [110]
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!
8 0
3 years ago
Solve for x <br> A) 12 <br> B) 11<br> C) 8 <br> D) 10
Furkat [3]

Answer:

B i would be good i solve 20 minutes

6 0
3 years ago
Can some please help ASAP
Lubov Fominskaja [6]

Answer:

9x-3

Step-by-step explanation:

To do this, we can make an equation and add like terms.

The equation is 2x+3x-1+4x-2=p. P stands for perimeter.

Now, simplify. Add like terms.

9x-1-2=p

9x-3=p

9x-3

The answer is D. 9x-3

Hope this helps!

7 0
3 years ago
Read 2 more answers
Find the mixed number of 18/3??​
11Alexandr11 [23.1K]

Answer:

6

Step-by-step explanation:

3 0
2 years ago
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Use completing the square to solve this quadratic equation x^2+10x+25=2
never [62]

answer:

( x + 5 )^2 = 2

5 0
3 years ago
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