Answer:
Step-by-step explanation:
The catch is to put this into the quadratic and solve for a b and c in three equations.
x = 1
a(1)^2 + b(1) + c= 0
a + b + c + 0 (1)
x = - 1
a(-1)^2 + b(-1) + c = 2
a - b + c = 2 (2)
x = 2
a(2)^2 + b(2) + c = 8
4a + 2b + c = 8 (3)
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Add 1 and 2 together
a + b + c = 0
a - b + c = 2
2a + 2c = 2 Divide by 2
a + c = 1 (4)
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Multiply (2) by 2
2a - 2b + 2c = 4 (5)
======================
Add (5) + (3)
2a - 2b + 2c = 4
4a + 2b + c = 8
6a + 3c = 12 (6)
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Multiply (4) by 3
3a + 3c = 3 (7)
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Subtract (7) from (6)
6a + 3c = 12
3a + 3c = 3
3a = 9 Divide by 3
3a/3 = 9/3
a = 3
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Use (4) to find c
a + c = 1
3 + c = 1 Subtract 3 from both sides
3-3 + c = 1-3
c = - 2
=================
Use 1 to find b
3 + b - 2 = 0 Combine 3 and -2
1 + b = 0 Subtract 1 from both sides
b = - 1
====================
Answers
a = 3
b = - 1
c = - 2
Answer:

Step-by-step explanation:
let the denominator of the original fraction be x, then
← is the original fraction
After the given changes, that is
=
( cross- multiply )
6(x - 7) = 3(x + 16) ← distribute parenthesis on both sides
6x - 42 = 3x + 48 ( subtract 3x from both sides )
3x - 42 = 48 ( add 42 to both sides )
3x = 90 ( divide both sides by 3 )
x = 30
Thus
=
← the original rational number
Hello! First things first, we need to find the area of the table. Just by doing some basic math, 10 * 17 is 170. The area of the computer table is 170 square feet. The table costs $16 per square feet. To find the total cost, all you have to do is multiply the area of the table by the cost per square foot. 170 * 16 is 2,720. The computer table will cost $2,720.
21 cups/ 4.2L per cup =5 L total
Hope this helps!!
Answer:
1/2
Step-by-step explanation:
hope it helps :)