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Ilya [14]
3 years ago
13

Someone please answer correctly

Mathematics
1 answer:
ivolga24 [154]3 years ago
5 0

Answer:

13

Step-by-step explanation:

It is a parallelogram so the opposite angles are the same.

All angles sum to 360 degrees.

This means that the adjacent angles sum to 180 degrees.

4a + 11 + 9a = 180 = 13a + 11

13a = 169

a=13

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7<img src="https://tex.z-dn.net/?f=%5Csqrt%20-9" id="TexFormula1" title="\sqrt -9" alt="\sqrt -9" align="absmiddle" class="latex
erik [133]

Answer:

= 21i

Step-by-step explanation:

√-9 = 3i

= 7 . 3i

Multiply the numbers: 7 . 3 = 21

= 21i

Hope this helps!

5 0
3 years ago
4 - x = 14<br><br><br> solve for x
VLD [36.1K]
Hey there! :)

If you switch the equation around, it becomes: 14 + x = 4

x = -10 because: -10 + 14 = 4

x = -10

Hope this helps :)
6 0
3 years ago
Given trapezoid LMNO, P is the midpoint of leg LO, Q is the midpoint of leg MN.
mylen [45]

Answer:

Yes

Step-by-step explanation:

Theorem 8.3: If two angles are complementary to the same angle, then these two angles are congruent.

3 0
3 years ago
Read 2 more answers
Please help me out it would be greatly appreciated
Dmitry_Shevchenko [17]

The area of the given parallelogram is 120.

Step-by-step explanation:

Step 1:

The parameters needed to determine the area of a parallelogram are the base length and height.

The base length of this parallelogram is 15 inches while its height is 8 inches.

The area of a rectangle is determined by multiplying the base length with the height.

Step 2:

The area of the parallelogram = (b)(h).

Here the base length is 15 inches and the height is 8 inches.

The area of the parallelogram =(15)(8) = 120.

So the area of the given parallelogram is 120.

5 0
3 years ago
Hi. I need help with these questions.<br> See image for question.<br> Answer 16 and 17
Irina-Kira [14]

Step-by-step explanation:

16.................................................

<h3>Given</h3>
  • Equation ax² + bx + c = 0
  • One of the roots is twice the other
<h3>To find</h3>
  • Show that 2b² = 9ac
<h3>Solution</h3>

Let the roots be p and q

<u>The sum and product of the roots:</u>

  • p + q = -b/a
  • pq = c/a

<u>The sum of the roots, considering p = 2q,</u>

  • p + q = 2q + q = 3q

And

  • 3q = -b/a ⇒ q = -b/(3a)

<u>The product of the roots, considering p = 2q:</u>

  • pq = 2q(q) = 2q²

And

  • 2q² = c/a

<u>Substitute q with -b/(3a)</u>

  • 2(-b/(3a))² = c/a
  • 2b²/(9a²) = c/a
  • 2b² = 9a²(c/a)
  • 2b² = 9ac

=================================================

17. .................................................

<h3>Given</h3>

Quadratic equation

  • ax² = bx + c = 0, with equal roots
<h3>To find</h3>
  • Show that b² = 4ac
<h3>Solution</h3>

<u>Equal roots means the discriminant is zero:</u>

  • D = √b² - 4ac
  • √b² - 4ac = 0
  • b² - 4ac = 0
  • b² = 4ac
3 0
3 years ago
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