3 years ago

Which expression is a trinomial? 2x² + 2x - 4 7x^3 - 2X 50x 2x²

Mathematics

2 answers:

andreev551 [17]3 years ago

5 0

The first option: 2x^2+2x-4 since there are three terms

Rudik [331]3 years ago

5 0

The first one Bc it is the only one with three terms

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A student concluded that the inequality −3+2y≤4x is equivalent to the inequality y≥2x+32, as shown below. Describe and correct t

timofeeve [1]

Answer:

$-3 +2y \leq 4x$

$2y \leq 4x+3$

$y \leq 2x + \frac{3}{2}$

And that's different from the claim of the student that:

$y \geq 2x +\frac{3}{2}$

The error of the student is that he/she changes the sign of the inequality from $\leq$ to $\geq$ and that's not possible since we don't multiply both sides of the equation by -1

Step-by-step explanation:

For this case we have the following inequality:

$-3 +2y \leq 4x$

We want to rewrite the last expression with y in the left and x in the right so we can begin adding 3 in both sides of the inequality and we got:

$2y \leq 4x+3$

Now we can divide both sides of the inequality by 2 and we got:

$y \leq 2x + \frac{3}{2}$

And that's different from the claim of the student that:

$y \geq 2x +\frac{3}{2}$

The error of the student is that he/she changes the sign of the inequality from $\leq$ to $\geq$ and that's not possible since we don't multiply both sides of the equation by -1

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3 years ago

Line j passes through the points (-5,-2)

Lisa [10]

Answer:

y=-1x+1

Step-by-step explanation:

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3 years ago

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a right triangle has side lengths of 5cm, 12cm, and 13cm. what is the length of hypotenuse? how do you know?

Galina-37 [17]