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larisa [96]
4 years ago
14

Solve the linear system by substitution 3c-2y=16 5x+y=18

Mathematics
1 answer:
andrew11 [14]4 years ago
6 0
It's x or c?
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...
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Evaluate the given expression when x = -4 and y = -1<br> 3x^2 - xy + 2y ^2
Inessa [10]

Answer:

46

Step-by-step explanation:

7 0
3 years ago
Find the greatest common factor of 6y^3 and 10n^2
Tasya [4]
SOLUTION:

GCF = 2

= 6y^3 + 10n^2

= 2 ( 3y^3 + 5n^2 )

Hope this helps! :)
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7 0
3 years ago
-(3/7)+the cost of renting a car is $45/wk plus $0.25/mi traveled during that week. an equation to represent the cost would be y
Wittaler [7]

Y = 45 + 0.25 * 60

y = 45 + 15

Y = 60

ie $60

5 0
4 years ago
80 is 25% of what number
alex41 [277]
320 is the answer just add 80 four times

3 0
4 years ago
Read 2 more answers
- Maria wants to buy a ring that costs $67.00. She has a coupon for 25% off.
Vilka [71]

Answer:

$16.75

Step-by-step explanation:

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 67 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 67 is 100%, so we can write it down as 67=100%.

4. We know, that x is 25% of the output value, so we can write it down as x=25%.

5. Now we have two simple equations:

1) 67=100%

2) x=25%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

67/x=100%/25%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 25% of 67

67/x=100/25

(67/x)*x=(100/25)*x       - we multiply both sides of the equation by x

67=4*x       - we divide both sides of the equation by (4) to get x

67/4=x

16.75=x

x=16.75

now we have:

25% of 67=16.75

8 0
3 years ago
Read 2 more answers
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