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anzhelika [568]
3 years ago
11

PLZ HALP. WILL GIVE BRAINIEST FOR CORRECT ANSWER WITH STEPS!!!!

Mathematics
2 answers:
Bad White [126]3 years ago
5 0

Answer:

for the first question it will be

Step-by-step explanation:

first make the equation from the numbers you see, (3x+7)+(10x+17)=180

the 180 comes from the lines that the equations are on both of the equations add up to 180 degrees,

then first add all like numbers [(3x+10x) + (7+17) = 180]= 13x+24=180

next subtract the non-variable number (forgot the term for it)

13x+24=180

<u>      -24  -24</u>

      13x=156

then divide the number in front of the variable

<u>13x</u>=<u>156</u>

<u>13    13</u>

x=12

then once you divide the answer is shown so you can put it in

mina [271]3 years ago
3 0

Answer:

See below.

Step-by-step explanation:

1.

3x + 7 + 10x + 17 = 180  ( property of inside angles of 2 parallel lines)

13x + 24 = 180

13x = 180 - 24 = 156

c = 156/13

x = 12.

2.

As the triangle is a right triangle:

42.7 + N = 90

N = 90 - 42.7

= 47.3. degrees.

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alex41 [277]
Since you're looking for the chance that the defective player occurs twice, you need to find the chance your friend receives a defective player given that you also receive one. The chance you receive a defective player is 4%, or 0.04. If you friend also receives a defective player, then the chance of both occurring is 4% of 4%, or 0.04 * 0.04, which equals 0.0016. So the probability that you can a friend both receive a defective player is 0.16%.
5 0
4 years ago
Solve each equation.
Georgia [21]
X/7 = 0.4 => x = 7 x 0.4 = 2.8
7/y = 0.4 => y = 7 : 0.4 = 17.5
4 0
3 years ago
2. Abby found the axis of symmetry, x-coordinate, the vertex, and y-intercept
krek1111 [17]

Using quadratic function concepts, it is found that Abby made a mistake on the coordinates of the vertex, which are (-4,1).

----------------------

  • A quadratic function is defined by:

y(x) = ax^2 + bx + c

  • The y-intercept is given by point: (0, y(0))
  • The vertex is given by: (-\frac{b}{2a}, y(-\frac{b}{2a})).
  • The axis of symmetry is: x = -\frac{b}{2a}

----------------------

The function given is:

f(x) = -x^2 - 8x - 15

  • Which is a quadratic equation with: a = -1, b = -8, c = -15.
  • f(0) = -0^2 - 8(0) - 15 = -15, thus, the y-intercept is (0, -15).

x_v = -\frac{b}{2a} = -\frac{(-8)}{2(-1)} = \frac{8}{-2} = -4

  • Thus, the <u>x-coordinate of the vertex</u> is x = -4, which is the same as the <u>axis of symmetry</u>.

f(-4) = -(-4)^2 - 8(-4) - 15 = 1

  • The vertex is given by: (-4,1).

A similar problem is given at brainly.com/question/14680175

8 0
3 years ago
12.
Verdich [7]

Answer:

C

Step-by-step explanation:

The elevati0on of sea level is 0 km and the elevation of the summit is 10 km

4 0
4 years ago
The scheduled arrival time for a daily flight from Boston to New York is 9:30 am. Historical data show that the arrival time fol
Galina-37 [17]

Answer:

Step-by-step explanation:

Let x be a random variable representing the flight arrival time from Boston to New York.

For a uniform probability distribution, the notation is

X U(a, b) where a is the lowest value of x and b is the lowest value of x

The probability density function, f(x) = 1/(b - a)

Mean, µ = (a + b)/2

Standard deviation, σ = √(b - a)²/12

From the information given, the time difference in minutes is 9:57 - 9:07 = 50 minutes. Therefore,

a = 0

b = 50

µ = (0 + 50)/2 = 25

σ = √(50 - 0)²/12 = 14.43

b) converting to minutes, it is 9:30 - 9:07 = 23 minutes

the probability that a flight arrives late(later than 9:30 am) is expressed as P(x > 23)

f(x) = 1/(50) = 0.02

P(x > 23) = (50 - 23)0.02 = 0.54

7 0
3 years ago
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