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2 years ago

11

On a piece of paper, graph y<-2/5x+1, then determine which answer choice matches the graph you drew

2 answers:

yanalaym [24]2 years ago

8 0

Graph B.
Because y< so shade underneath the line
And because it is less then not less than or equal to then the line is dashed.

zavuch27 [327]2 years ago

3 0

Answer:

(B)

Step-by-step explanation:

The given equation is $y< \frac{-2}{5}x+1$

Taking different values for x and y, we have the graph. Since y is less than $\frac{-2}{5} x+1$ , therefore the line plotted will be dotted because it is not having equality sign. If y would be less than or equal to $\frac{-2}{5}x+1$ , then the line will be the solid one.

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2 years ago

Solve your equation using trail and improvement. A number plus ten times its square root is is equal to one thousand

Alex

Answer:

$x \approx 729$

Step-by-step explanation:

Given

Let the number be x

So:

$x + 10\sqrt x = 1000$

Required

Using trial and improvement, find x

This implies that we keep guessing the values of x until we get a value that match the equation.

Let

$x = 625$

So, we have:

$x + 10\sqrt x = 1000$

$625 + 10 *\sqrt{625}$

Take the square root of 625

$625 + 10 *\sqrt{625} = 625 + 10 *25$

$625 + 10 *\sqrt{625} = 625 + 250$

$625 + 10 *\sqrt{625} = 875$

Let

$x = 729$

So, we have:

$x + 10\sqrt x = 1000$

$729 + 10 * \sqrt{729}$

Take the square root of 729

$729 + 10 * \sqrt{729} = 729 + 10 * 27$

$729 + 10 * \sqrt{729} = 729 + 270$

$729 + 10 * \sqrt{729} = 999$

At this point, we can conclude that x is approximately 729 because

$999 \approx 1000$

So:

$x \approx 729$

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2 years ago