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Lisa [10]
2 years ago
11

SOMEONE PLEASEEEEE HELPPPPPP

Mathematics
1 answer:
Solnce55 [7]2 years ago
3 0

9514 1404 393

Answer:

  x = 16

Step-by-step explanation:

The angle bisector divides the sides proportionally.

  (x -4)/9 = x/12

  4(x -4) = 3x . . . . . . . multiply by 36

  x = 16 . . . . . . . . . . . . add 16-3x to both sides, simplify

You might be interested in
Do you guys know what 4m - 2m + 3
lyudmila [28]

Answer:

2m + 3 I think.

Step-by-step explanation:

4m - 2m = 2m. So just put that in the equation now and poof. 2m + 3

4 0
2 years ago
PLEASE HELP AND EXPLAIN!!
prisoha [69]

Answer:

D

Step-by-step explanation:

This isnt a cartisean coordinate plane so A is wrong. One of our points is at

- 3 + i

Because it coincide with real number 3, and negative imaginary number i.

Conjugates are terms with opposite inverse of terms.

So our conjugates is

- 3 - i

3 0
3 years ago
Correct I’ll give brainlist no links or I’ll report
Margarita [4]

Answer:

-2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Let $a$ and $b$ be nonzero real numbers such that
algol [13]
<h3>Answer:   -7/2</h3>

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

Explanation:

Let's expand out (2 - 7i)(a + bi) using the FOIL rule

(2 - 7i)(a + bi) = 2a + 2bi - 7ai - 7bi^2

(2 - 7i)(a + bi) = 2a + 2bi - 7ai - 7b(-1)

(2 - 7i)(a + bi) = 2a + 2bi - 7ai + 7b

(2 - 7i)(a + bi) = (2a+7b) + (2bi-7ai)

(2 - 7i)(a + bi) = (2a+7b) + (2b-7a)i

We're told the result is purely imaginary. What this means is that the real part (2a+7b) is zero, while the imaginary part (2b-7a) is nonzero. If both are zero, then we have 0+0i = 0 which is purely real.

For example, the complex numbers 0-7i and 0+2i are purely imaginary.

Let's use the fact that 2a+7b must be zero to do the following steps:

2a+7b = 0

2a = -7b

a = -7b/2

a/b = -7/2 which is the final answer

We must check to see if 2b-7a is nonzero

2b - 7a = 2b - 7(-7b/2)

2b - 7a = 2b + 24.5b

2b - 7a = 26.5b

The result is nonzero if and only if b is nonzero. Luckily we're told b is nonzero at the top of the problem. So we don't have any worries that (2b-7a) is zero.

Therefore, (2a+7b) + (2b-7a)i will be purely imaginary with a/b = -7/2

------------------

A concrete example:

Let a = -14 and b = 4

a/b = -14/4 = -7/2

(2-7i)(a+bi) = (2-7i)(-14+4i) = 0 + 106i which is purely imaginary.

I'll let you do the steps in expanding that out using the FOIL rule.

4 0
1 year ago
Given triangle 'ABC' with a = 4, b = 11, and measurement of A = 41 Degrees , find the number of distinct solutions.
n200080 [17]
It should be A, since b=11> acosA
3 0
3 years ago
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