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Vlad [161]
3 years ago
12

I really dont get this please help just A, B, and C

Mathematics
1 answer:
alexandr402 [8]3 years ago
4 0
The pic is kinda blurry so I can’t read it
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Find the measure of Angle B<br><br> A. 50°<br> B. 55°<br> C. 60°<br> D. 65°
kondaur [170]

Option B. 55° is the correct answer

Step-by-step explanation:

"The sum of interior angles of a triangle is always 180°"

Given

m∠A=(3x+1)°

m∠B=(2x-1)°

m∠C = 40°

We know that

m∠A+m∠B+m∠C=180°

Putting the values of angles

(3x+1) +(2x-1) +40 = 180\\3x+1+2x-1+40 = 180\\5x+40=180\\

Subtracting 40 from both sides

5x+40-40=180-40\\5x=140

Dividing both sides by 5

\frac{5x}{5} = \frac{140}{5}\\x=28

We have to find Angle B,

So

m∠B = 2x-1 = 2(28)-1 = 56-1 = 55°

Hence,

m∠B=55°

Option B. 55° is the correct answer

Keywords: Triangle, Interior angles

Learn more about triangles at:

  • brainly.com/question/12896802
  • brainly.com/question/12973601

#learnwithBrainly

8 0
3 years ago
Let <img src="https://tex.z-dn.net/?f=sin%5Cbeta%20%3D%5Cfrac%7B2%5Csqrt%5B%5D%7B2%7D%20%7D%7B5%7D%20%5C%5C" id="TexFormula1" ti
Brrunno [24]

Since beta is in the first quadrant, the final answer will be positive.

To find cos(beta) so we can use the half angle identity, we can substitute into the Pythagorean identity. Doing so gives us that

\sin( \beta )  =  \frac{ \sqrt{17} }{5}

So, this means that

\sin( \frac{ \beta }{2} )  =  \sqrt{ \frac{1 -  \frac{ \sqrt{17} }{2} }{2} }  =  \sqrt{ \frac{2 -  \sqrt{17} }{4} }  =  \frac{ \sqrt{2 -  \sqrt{17} } }{2}

3 0
2 years ago
Ivy invested $150 000 in a savings account that offers to pay simple interest of 0.2% per year. How much interest will she recei
kvv77 [185]

Answer:

The answer is the CD was for 3 years.

Step-by-step explanation:

First, write the equation.

I=Prt

Next, substitute the given values.

$198=$1,200×5.5%×t

Next, write the percent as a decimal.

$198=$1,200×0.055×t

Next, simplify.

$198=$66×t

Then, solve for t.

3=t

8 0
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What is (8 × 10 -3 )(.0003) in scientific form.
murzikaleks [220]

Answer:

2.31 ×10 ^− 2

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

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Expand And Simplify<br><br> 2(b+3) -4 (b-6)
mrs_skeptik [129]

Answer:

Step-by-step explanation:

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