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3 years ago

Is (2,2) in the solution set of y ≥ 9x - 8?

Mathematics

1 answer:

DaniilM [7]3 years ago

8 0

No (2,2) isn’t a solution

y=2 and x=2
2>_ 9 (2)-8
2>_ 18-8
2>_ 10 this statement is false

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A Traveller changed EC $1800 to Barbados currency. Calculate the amount received

natta225 [31]

Answer:

1350 bajan dollar

Step-by-step explanation:

The exchange rate of EC dollar to Barbados currency is

1 EC dollar = 0.75 Barbados currency

EC $1800 in Barbados currency = EC $1800 x 0.75 = 1350 bajan dollar

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3 years ago

G(t)=2(3)^t for t=-2

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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Solve for x in the equation 2 x squared + 3 x minus 7 = x squared + 5 x + 39.

Nastasia [14]

Answer:

$\implies x=1\pm \sqrt{47}$

Step-by-step explanation:

We want to solve for x in $2x^2+3x-7=x^2+5x+39$

You need to group and combine like terms and write in standard form:

$2x^2-x^2+3x-5x-7-39=0$

$\imples x^2-2x-46=0$

By comparing to $ax^2+bx+c=0$ , we a=1,b=-2 and c=-46

The solution can be obtained using the quadratic formula.

$x=\frac{-b\pm \sqrt{b^2-4ac} }{2a}$

We substitute the coefficients to get:

$x=\frac{--2\pm \sqrt{(-2)^2-4*1*-46} }{2*1}$

$x=\frac{2\pm \sqrt{4+4*46} }{2}$

$x=\frac{2\pm \sqrt{4*47} }{2}$

$x=\frac{2\pm2\sqrt{47} }{2}$

$\implies x=1\pm \sqrt{47}$

The last choice is correct

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3 years ago

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lana66690 [7]

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4 years ago

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