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True [87]
2 years ago
10

Select the reason that best supports statement both 2 and 8 in the given proof.​

Mathematics
1 answer:
LenKa [72]2 years ago
7 0
It’s probably 10 given proof
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The sides of a triangle have lengths x + 3, 4(x - 13), and 3 over 4 x. The perimeter of the triangle is 3x +6. What is the lengt
nignag [31]

Answer:

shortest side = 15

Step-by-step explanation:

The question is a bit ambiguous. Do you mean (3/4) x or do you mean 3/(4x)?

I'll take it to be the first one.

(x + 3) + 4(x - 13) + (3/4)x = 3x + 6    Remove the brackets on the left

x + 3 + 4x - 52 + 0.75 x = 3x + 6      Combine

5.75x - 49 = 3x + 6                           Subtract 3x from both sides.

2.75x - 49 = 6                                     Add 49 to both sides

2.75x = 55                                          Divide by 2.75

x = 55/ 2.75

x = 20

Now for the shortest side

x + 3 = 23

4(x - 13) = 4(20 - 13) = 4*7 = 28

(3/4)*20 = 15

The shortest side = 15

3 0
3 years ago
The equation y=ax^2 describes a parabola. If the value of a is positive, which way does the parabola open?
Ivenika [448]
<h3>Answer:</h3>

A. Up

<h3>Step-by-step explanation:</h3>

Parabolas are graphs that make U-shapes and are formed from quadratic equations.

Vertical Parabolas

There are 2 different types of parabolas: vertical and horizontal.

  • Vertical parabolas have a vertical axis of symmetry. So, they open up or down.
  • Horizontal parabolas have a horizontal axis of symmetry. So, they open left or right.

If the x-value is squared, then the parabola is vertical. So, this graph must open up or down.

Positive A-Value

The a-value is the coefficient before the squared term. In a vertical parabola, the graph opens up if the a-value is positive. On the other hand, the graph opens down when the a-value is negative.

In this case, the graph is a vertical parabola that opens up. This means that the range will have a minimum value but no maximum.

8 0
2 years ago
Find the curved surface area of a cylinder diameter 12cm and length 30cm (fast plz) ​
Effectus [21]

Answer:

solution:-

diameter of a cylinder (d) = 12 cm

length(h) = 30 cm

curved surface area of cylinder (csa) = ?

we know that ,

therefore , csa of cylinder = 2πrh

r = d/2

or, r = 12/2= 6 cm

Then, csa if cylinder = 2 ×22/7×30

= 2×22×30/7

= 1320/7

= 188.57 Square cm Ans,......

7 0
3 years ago
42 ÷ 1 1<br> -<br> 2<br><br> is equal to
Bad White [126]

Step-by-step explanation:

or alternative answer is 1.818181...

5 0
2 years ago
Which quadratic inequality does the graph below represent?<br> y&gt;x^2-3<br> y y y&gt;x^2+3
pychu [463]

Answer:

Third one

Step-by-step explanation:

the y intercept is -3 meaning it equals, leaving 1 or 3

and it’s the smallest y number so it has to be 3

Sorry for who ever uploaded the disturbing photos :(

Hope this help and have a nice day!

I’ll continue to report the, as I have all day and will contact Brainly again since this is another account

Here’s a cute dog image to remove the other photo from mind

7 0
3 years ago
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