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iris [78.8K]
3 years ago
14

ANYONE...........help​

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
3 0

Answer:

  • 1 cm

Step-by-step explanation:

<u>Sides of the picture added margin:</u>

  • l = 8 + 2x
  • w = 5 + 2x
  • A(margin) = 30 cm²

<u>Solution</u>:

  • A(margin) = Total area - A(picture)
  • (8 + 2x)(5 + 2x) - 5*8 = 30
  • 4x² + 10x + 16x + 40 - 40 - 30 = 0
  • 4x² + 26x - 30 = 0
  • 2x² + 13x - 15 = 0
  • x = (-13 + √(13² + 2*4*15))/4
  • x = (-13 + 17)/4
  • x = 1 cm

Note. The other root is ignored as negative.

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X/9 = 5/16<br> please show calculations!
yaroslaw [1]
The picture above is the correct answer. Just find 45 divided by 16 for the decimal value.

4 0
3 years ago
Read 2 more answers
Select all the lines that have a slope of 5/2.
Volgvan

Answer:

A rate of 5/2 means that:

If we move 2 units to the right, we move 5 units up.

Let's see all the graphs, the easier way to know this is:

In any point of the line, move to the right 2 units.

Then from that point, move up until you meet again with the line, if you moved 5 units, then the slope is 5/2.

A) The slope is 5/2.

B) The slope is 4/2

C) the slope is 5/2

I can not see very well graphs E and D in the image.

E) may have a slope of 5/2, you should measure it.

D has not a slope of 5/2,  you can compare it with A and see that is totally different, so you can discard option D.

6 0
3 years ago
20 points! o(* ̄▽ ̄*)\
Hatshy [7]

Answer:

\displaystyle y=8x

Step-by-step explanation:

We are given a table and we want to determine a linear equation (in slope-intercept form) that represents this table.

So, we will first need to determine the slope. We can use the slope formula:

\displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Where (x₁, y₁) and (x₂, y₂) are two points.

We have three points: (1, 8), (2, 16), and (3, 24).

Let’s pick two. We can use (1, 8) and (2, 16).

So, let (1, 8) be (x₁, y₁) and let (2, 16) be (x₂, y₂). Substitute appropriately:

\displaystyle m=\frac{16-8}{2-1}

Evaluate:

\displaystyle m=\frac{8}{1}=8

So, our slope is 8.

Now, we can determine the equation using point-slope form:

\displaystyle y-y_1=m(x-x_1)

Where m is our slope and (x₁, y₁) is a point.

We know that the slope is 8, so we will substitute 8 for m.

We can use any of our three points for the point. Let’s use (1, 8) for consistency. So, let (1, 8) be (x₁, y₁). Substitute appropriately:

\displaystyle y-8=8(x-1)

Solve for y. Distribute the right:

\displaystyle y-8=8x-8

Add 8 to both sides:

\displaystyle y=8x

And we have our equation.

Notice that this is a direct variation or proportional equation as we don’t have a y-intercept.

5 0
3 years ago
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Could someone solve this for me.
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What is the product of 0.2*7
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