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
Lady_Fox [76]
3 years ago
7

Will give brainliest, please help

Mathematics
1 answer:
Rus_ich [418]3 years ago
6 0

Answer:

C

Step-by-step explanation:

A triangle always consists of it being 180 degrees. The box on the triangle on angle A depicts that it is a right angle, 90 degrees. And since Angle B is given at 45, angle C must be 45 degrees as well, since 180-45-90 (triangle angles=given angles for A and B) equal up to 45. When the angles beside the right angle is both identical and the same, the sides that correspond with that triangle is also the same. AC is given at 9 feet, and since Angle C and B both have the same angles, AB must ALSO be a 9ft.

Now, since we know the two sides, it is very easy to find BC, or the hypotenuse of the triangle, using the Pythagorean Theorem: a^{2} +b^{2} =c^{2}, where a and b are sides, and c is the hypotenuse (or the long end) of a right triangle.

We can plug both 9s in for a and b since they're both the same, and it should equal to

9^2+9^2=c^2.

9^2 is 9*9, and that is 81. We have two of these so add them together to find 162. Since c^2 is equal to 162, we would need to square root both sides so we can find a number that equals c.

\sqrt{162} =c

We can either plug this into a calculator, and we should get something around 12.72, and that would be the same as C if you plug that value into a calculator.

You can also simplify the radical if you know how to. 162 is 81 times 2 (example) and 81 is 9*9, so we can add that to the outside and 2 is still under the radical. But this would only make sense if you know how to do that.

You might be interested in
Which BEST shows where this function is only decreasing?
Setler79 [48]
The answer is definitely A because that’s the only place the graph is decreasing
4 0
2 years ago
consider the polynomial 2/3x (2x-3) - (x-7) (x+7) when simplified, what is the coefficent of the quadratic term?
Svet_ta [14]

Answer:

x^2 - 6x + 147 so the coefficient is 1

Step-by-step explanation:

First, simplify the equation.

1. 2/3x(2x-3) = (2x/3)(2x-3)-(x-7)(x+7)

2. 2x-3(2x/3) = (2x(2x-3)) - (x-7)(x+7)

3. Expand -(x-7)(x+7) = -x^2+49

Combine to get (x^2 - 6x)/3 +49

Simplify to get x^2 - 6x + 147. The coefficient of the quadratic term is one.

4 0
3 years ago
PLEASE PLEASE HELP!!!GIVING BRAINLEIST!! RESPOND IN 5 MIN FOR POINTS!!❤️
Mamont248 [21]

Step-by-step explanation:

The error carolyn has made is that she hasn't subtracted properly.

2x + 3y - (2x +6y) = 2x - 2x + 3y - 6y = -3y.

Carolyn probably didn't use parentheses...

To do the thing in substitution, we single out x or y in any equation. In this case, i'm gonna single out the x in the 2nd eqn. In other words, i'll make x the subject of the 2nd eqn.

2x + 6y = 10

2x         = 10 - 6y

x           = 5 - 3y

Now we simply plug in 5 - 3y wherever x apperas in the 1st equation.

2 (5-3y) + 3y = 8

10 - 6y + 3y   = 8

10 - 3y           = 8

-3y                 =  -2

y                    = 2/3

Then x = 5 - 3*2/3 = 3

x=3

y=2/3

Hope it helps:)              

8 0
3 years ago
The table shows the number of flights leaving an airport. How many flights leave in four days?
Vera_Pavlovna [14]

Answer:

16

Step-by-step explanation:

1 times what equals 16

what =16

2 times what equals 32

what=16

etc....

The answer is 16 because the table shows multiples of 16.

16, 32, 48,64, 80....

4 0
3 years ago
Two angles are supplementary angles. One angle measures 58 degrees. The other angle measures 3n + 5 degrees. What is the value o
stepladder [879]

Answer:

39

Step-by-step explanation:

Angles are supplementary when they add up to 180.  So, we know the other angle that isn't 58 is 180-58=122.  Therefore, 122=3n+5\\3n=117\\n=39

5 0
3 years ago
Other questions:
  • one month, jerry worked 3 hours less than ben, and chris worked 4 more hours than ben. together they worked 196 hours. find the
    7·1 answer
  • Please answer, 20 points, thanks, and brainiest. Improper answers will be reported so dont comment 'idk' just to get points.
    13·2 answers
  • HELP QUICK PLEASEE THANKS
    9·2 answers
  • Find the area of a triangle with a base length of 6 units and a height of 7 units. (1 point) 10 units 13 units 14 units 21 units
    11·2 answers
  • The number of widgets that a manufacturing plant can produce varies jointly as the number of workers and the time that they have
    14·1 answer
  • To find an object’s density (D), first measure its mass (m) and volume (V). Then use the following equation:
    12·1 answer
  • An experiment consists of tossing a coin and drawing a card, with the card-drawing stage dependent on the result of the coin tos
    14·2 answers
  • Help? I need a answer
    7·1 answer
  • Is it christmas yet?
    14·1 answer
  • A bag of sweets contains mints and toffees only.There are 21 mints in the bag.One quarter of the sweets are toffees.Calculate th
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!