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aalyn [17]
3 years ago
14

Solve the system by substitution. 9y - 6 = x 2x - 8y = 18​

Mathematics
1 answer:
Oksanka [162]3 years ago
7 0

Answer:

Step-by-step explanation:

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Two functions are given.
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Hi

f(x) = g(x)   if    -x²+3x-2   - ( -x+1) = 0

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To solve, tou have to use the general method of resolution of a quadratic fonction.  

To determine if it's has a solution in R, let's calculate  Δ

Δ = (4)² - 4 * (1) *(-3)

Δ = 16 +12

Δ= 28  

as Δ≥ 0  so  the function allow two solution within R  

so S 1 =  ( -4 +√28) / 2            S 2 =   (-4 -√28 ) /2

    S1 =   ( -4 + 2√7) /2            S2 =    (-4 - 2√7) /2

    S1 =    (2 (-2 +√7) /2            S2      2 (-2 -√7)   /2

    S1 =    -2 +√7                       S2 =      -2 -√7

So the two function  are equal   twice. one  for   x = -2 +√7  and second x = -2-√7

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3 years ago
Can someone please help me understand linear equations ?
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Bones provide support for our bodies and help form our shape. Although they're very light, bones are strong enough to support our entire weight.

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3 years ago
The lines on a coordinate plane are perpendicular.
nataly862011 [7]

Answer:

They form right angles 90 degrees angles

Step-by-step explanation:

4 0
3 years ago
Translate and solve: 261 is what percent of 174?
scoray [572]

Answer:

454.14

Step-by-step explanation:

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