1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anastaziya [24]
2 years ago
15

Find the measures of angles a=(2x+3) and b=(2x-3),if their sum is 120 degrees

Mathematics
1 answer:
Ira Lisetskai [31]2 years ago
8 0

Answer:

angle A is 63 degrees,

angle B is 57 degrees

Step-by-step explanation:

first, let's create the equation. Pretty simple, because angles a and b become 120 degrees when added up, this this will become:

2x+3+2x-3=120

now, we make it simpler. In this case, just add up the numbers that we can add up. this eventually becomes:

4x=120

now, all we need to do is divide 120 by 4, which becomes 30. So, x=30.

substitute the 30 into the x in the original equation, and this becomes:

60+3+60-3=120

63+57=120

thus, angle A is 63 degrees, and angle b is 57 degrees.

You might be interested in
What is 3 and 3/4 as a decimal
Simora [160]
It should be 3.75 think of it as a dollar 3/4 of a dollar is .75
5 0
3 years ago
Read 2 more answers
This is due tomorrow and i have answers but i think ive done it wrong! please help
Eva8 [605]

Answer:  i) 1 - 9x² - 12x

               ii) 17 - 3x²

             iii) - 20 + 10x² - x⁴

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

g(x) = 3x + 2       h(x) = 5 - x²

i) h(g(x))

  h(3x + 2) = 5 - (3x + 2)²

                  = 5 - (9x² + 12x + 4)

                  = 5 - 9x² - 12x - 4

                  = 1 - 9x² - 12x

ii) g(h(x))

   g(5 - x²) = 3(5 - x²) + 2

                 = 15 - 3x² + 2

                 = 17 - 3x²

iii) h(h(x))

   h(5 - x²) = 5 - (5 - x²)²

                 = 5 - (25 - 10x² + x⁴)

                 = 5 - 25 + 10x² - x⁴

                 = -20 + 10x² - x⁴

4 0
3 years ago
Please help out explanation need it
prisoha [69]

Answer:

A=2(wl+hl+hw)

A=2(6ft×7ft+6ft×7ft+6ft×6ft)

A=2(42ft²+42ft²+36ft²)

A=2(120ft²)

A=240ft²

Step-by-step explanation:

8 0
3 years ago
A machine cuts 25 circuit boards every 5 minutes. What is the unit rate of production for the machine?
Sladkaya [172]

Answer:

  • B- 5/1 boards/minutes

Step-by-step explanation:

<u>Unit rate is the number of circuit boards a minute:</u>

  • 25 boards every 5 minutes >>
  • 25/5 boards every 5/5 minutes >>
  • 5/1 boards/minutes

Correct choice is B

3 0
2 years ago
Prove that sin20sin40sin60sin80=3/16
never [62]
We'll use the following properties of sine and cosine to prove this:

sin(a)\cdot sin(b) = \frac12(cos(a-b) - cos(a+b))

cos(a)\cdot cos(b) = \frac12(cos(a+b) + cos(a-b))

cos(180+a) = cos(180-a)

Then it's just a matter of filling it in...

sin20sin40 * sin60sin80 = 1/2(cos20 - cos60) * 1/2 (cos20 - cos140) =

1/8( cos40 + 1 - cos160 - cos120 - cos40 - cos80 + cos80 + cos200) =

1/8(1 -  cos160 - cos120 + cos200) =

1/8(1 -  cos160 - cos120 + cos160) =

1/8(1 - cos120 ) = 1/8( 1 + 1/2 ) = 3/16

5 0
3 years ago
Other questions:
  • What percent of 88 is 154?
    10·1 answer
  • Which of the following best corresponds to the x-value where the function f(x)=cos x is a minimum in the interval x=|25,30|
    12·1 answer
  • When the radius of a circle is multiplied by a factor of 2 22, by what factor will the area of the circle change?
    10·1 answer
  • Would you rather use a ruler or colored tiles
    13·1 answer
  • Simplify: 3u2 + 21u2
    11·1 answer
  • Shannon test-drives a car in Germany and drives 95 kilometers per hour. What is her speed in the miles per hour ?
    14·1 answer
  • Name 3 pairs of adjacent angles and 3 pairs of vertical angles.​
    5·1 answer
  • Please help me its 15 pts and brainlist
    11·1 answer
  • A graphic designer wants to create a rectangular graphic that has a 2-inch margin on each side and a 4-inch margin on the top an
    11·1 answer
  • Find the value of x.<br> A<br> B<br> X<br> 6<br> 3<br> 2<br> D<br> x = [?]<br> C
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!