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scZoUnD [109]
3 years ago
13

Could someone please help​

Mathematics
2 answers:
ahrayia [7]3 years ago
7 0

Answer:

Step-by-step explanation:

The answer would be 11

Likurg_2 [28]3 years ago
5 0

Answer:

D. 7

Step-by-step explanation:

The triangle is congruent to the bigger triangle but is 1/3 the size. 1/3 of 21 or 21/3 = 7.

You might be interested in
n the graph below determine how many real solutions the quadratic function has, and state them, if applicable. List solutions in
IRINA_888 [86]

Answer:

There are no real solutions.

Step-by-step explanation:

There are 3 options.

2 real solutions: This happens if in the graph, each arm intersects the x-axis, this means that there are two different values of x such that the equation:

a*x^2 + b*x + c

is equal to zero.

Another way to see this, is if the determinant:

b^2 - 4*a*c

is larger than zero.

1 real solution: This happens when the vertex of the graph intersects the x-axis. This means that there is a single value of x such that:

a*x^2 + b*x + c

is equal to zero.

Another way to see this is if the determinant:

b^2 - 4*a*c

is larger equal zero.

No real solution: if in the graph we can not see any intersection of the x-axis, then we do not have real solutions (only complex ones).

Another way to see this is if the determinant:

b^2 - 4*a*c

is smaller than zero.

Now that we know this, let's look at the graph.

We can see that the vertex is below the x-axis, and the arms of the graph go downwards. So the arms will never intersect the x-axis (and neither the vertex).

So the graph does not intersect the x-axis at any point, which means that there are no real solutions for the quadratic equation.

The correct answer would be "none"

3 0
3 years ago
The tree diagram represents an experiment consisting of two trials. ​
Afina-wow [57]

Answer:

.26

P(C) = .6*.3   + .4 *.2

      = .18+.08

     = .26

Step-by-step explanation:

4 0
2 years ago
I need to know what the square root of 280 is​
beks73 [17]

16.733

It approximately the answer (17) if rounded

6 0
3 years ago
Read 2 more answers
Area of a circular ring: A = 4<img src="https://tex.z-dn.net/?f=%20%5Cpi%20" id="TexFormula1" title=" \pi " alt=" \pi " align="a
OleMash [197]
1a)      A = 4πpw
      /4πw = /4πw
  A / 4πw = p

1b) A = 4πpw
     22 = 4πp(2)
       p = 11/4π (≈0.87)

2a)        P = 2πr + 2x
      P - 2x = 2πr
        /2π      /2π
 P-2x / 2π = r

2b)    P = 2πr + 2x
      440 = 2πr + 2(110)
          r = 110/π (≈35.014)
      

      
8 0
3 years ago
A right triangle has one angle that measures 25º. What is the measure of the other acute<br> angle?
Leya [2.2K]

Answer:

65

Step-by-step explanation:

All the angles in a right triangle add up to 180

plug in what we know and we get

90+25+x=180

115+x=180

x=65

6 0
3 years ago
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