11 Points Math Please help fast!!!

The measure of an angle is 144.5 degrees what measure of it supplementary angle?<br><br>

kobusy [5.1K]

Answer:

180-144.5= 35.5

Explanation:

Supplementary means two angles add up to 180 degrees.

so 180-144.5= 35.5

Hope it helps you.

7 0

3 years ago

If in a triangle ac= 15 and angle abc=60 degrees what is ab?

marin [14]

Answer:

∠A=30° and AC and BC is 13 and 7.5 units respectively

Step-by-step explanation:

Given that in a right triangle ABC , right angled at C , if angle B =60 degree and AB =15 units

we have to find the remaining angles.

By angle sum property, sum of angles in right angle is 180°

∠A+∠B+∠C=180°

∠A+ 60°+90°=180

∠A=180°-150°=30°

∠A=30°

As AB= 15

Now by trigonometric ratios we find the other sides of triangle ABC

Hence, ∠A=30° and AC and BC is 13 and 7.5 unitsStep-by-step explanation:

∠A=30° and AC and BC is 13 and 7.5 units respectively

Step-by-step explanation:

Given that in a right triangle ABC , right angled at C , if angle B =60 degree and AB =15 units

we have to find the remaining angles.

By angle sum property, sum of angles in right angle is 180°

∠A+∠B+∠C=180°

∠A+ 60°+90°=180

∠A=180°-150°=30°

∠A=30°

As AB= 15

Now by trigonometric ratios we find the other sides of triangle ABC

Hence, ∠A=30° and AC and BC is 13 and 7.5 units

3 0

3 years ago

In solving the following system of equations, how many equations do you need to multiply in order to use the method of eliminati

77julia77 [94]

Answer:

a and d i think

Step-by-step explanation:

4 0

3 years ago

Does anyone know how to do this ??? <br> -view attachment

cricket20 [7]

As soon as I read this, the words "law of cosines" popped
into my head. I don't have a good intuitive feeling for the
law of cosines, but I went and looked it up (you probably
could have done that), and I found that it's exactly what
you need for this problem.

The "law of cosines" relates the lengths of the sides of any
triangle to the cosine of one of its angles ... just what we need,
since we know all the sides, and we want to find one of the angles.

To find angle-B, the law of cosines says

   b² = a² + c² - 2 a c cosine(B)

B = angle-B
b = the side opposite angle-B = 1.4
a, c = the other 2 sides = 1 and 1.9

(1.4)² = (1)² + (1.9)² - (2 x 1 x 1.9) cos(B)

   1.96 = (1) + (3.61) - (3.8) cos(B)

Add 3.8 cos(B) from each side:

   1.96 + 3.8 cos(B) = 4.61

Subtract 1.96 from each side:

   3.8 cos(B) = 2.65

Divide each side by 3.8 :

cos(B) = 0.69737 (rounded)

Whipping out the
trusty calculator:
   B = the angle whose cosine is 0.69737

      = 45.784° .

Now, for the first time, I'll take a deep breath, then hold it
while I look back at the question and see whether this is
anywhere near one of the choices ...

By gosh ! Choice 'B' is 45.8° ! yay !
I'll bet that's it !

8 0

3 years ago

Use synthetic division to solve (2x^34x^2-35x15)/(x-3). What is the quotient?

victus00 [196]

Answer: quotient is 2x^2 + 10x - 5

Solution:

The first polynomial is miswritten.

The right one is: 2x^3 + 4x^2 - 35x + 15.

So, the division is [2x^3 + 4x^2 - 35x + 15] / (x - 3)

The synthetic division uses the coeffcients and obviate the letters, but you have to be sure to respect the place of the coefficient.

So, in this case it is:

3 | 2      4    -35    15
   ---------------------------------
    2     10     - 5      0

So, the quotient is 2x^2 + 10x - 5, and the remainder is 0.

I like to show it in this other way:

   | 2     4     -35     15
   |
   |
3 |       +6    +30     -15
--------------------------------
    2     10    - 5         0

Of course they are the same coefficients and the answer continue being quotien 2x^2 + 10x - 5, remainder 0.

4 0

3 years ago