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Bond [772]
3 years ago
7

Rachel spent $70 more than Samuel. If Samuel spent $449, then how much did Rachel spend?

Mathematics
2 answers:
REY [17]3 years ago
6 0

Answer:

$519

Step-by-step explanation:

Since Samuel spent $449, and Rachel spent $70 more. This will be an addition problem.

449 + 70 = 519

tatiyna3 years ago
4 0

Answer: Rachel spent $519

Step-by-step explanation: Add 70 to 499 and you get 519

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Solve 2x2 + x − 4 = 0. x2 + x + = 0
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Answer:

The Quadratic Polynomial is

2 x² +x -4=0

Using the Determinant method to find the roots of this equation

x=\frac{-1\pm \sqrt{1^2-4*2*(-4)}}{2\times 2}\\\\ x=\frac{-1 \pm \sqrt{32}}{4}{\text{Using the formula}}x=\frac{-b\pm\sqrt{D}}{2a}, {\text{where}},D=b^2-4 ac

For, the Quadratic equation , ax²+ b x+c=0

(b) x²+x=0

x × (x+1)=0

x=0  ∧ x+1=0

x=0     ∧   x= -1

You can look the problem in other way

the two Quadratic polynomials are

2 x²+x-4=0, ∧ x²+x=0

x²= -x

So, 2 x²+x-4=0,

→ -2 x+x-4=0

→ -x -4=0

→x= -4

∨

x² +x² +x-4=0

x²+0-4=0→→x²+x=0

→x²=4

x=√4

x=2 ∧ x=-2

As, you will put these values into the equation, you will find that these values does not satisfy both the equations.

So, there is no solution.

You can solve these two equation graphically also.

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Step-by-step explanation:

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