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Arada [10]
3 years ago
8

Two lines, C and D, are represented by the following equations:

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
8 0

Answer:

Option B is correct

Step-by-step explanation:

dalvyx [7]3 years ago
5 0
For this case we have the following system of equations:
 y = x + 5
 y = -2x - 1
 Substituting the point (-2, 3) we have:
 For Line C:
 y = x + 5
 3 = -2 + 5
 3 = 3
 The line goes through this point.
 For Line D:
 y = -2x - 1
 3 = -2 (-2) - 1
 3 = 4 - 1
 3 = 3
 The line goes through this point.
 Answer:
 
(-2, 3), because both lines pass through this point
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Simplify the expression by combining like terms. -8y + 2 + 10y - 7<br> Please help
Alecsey [184]

Answer:

<u>2y - 5 (read below)</u>

Step-by-step explanation:

-8y + 10y = 2y

2 + (-7) = -5

Your expression could/would be:

2y - 5.

Hope this helps!

8 0
3 years ago
Read 2 more answers
PLEASE HELP GIVING MANY POINTS!
NeTakaya

Answer:

  69.01 m

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you ...

  Tan = Opposite/Adjacent

The tangent function is useful for problems like this. Let the height of the spire be represented by h. The distance (d) across the plaza from the first surveyor satisfies the relation ...

  tan(50°) = (h -1.65)/d

Rearranging to solve for d, we have ...

  d = (h -1.65)/tan(50°)

The distance across the plaza from the second surveyor satisfies the relation ...

  tan(30°) = (101.65 -h)/d

Rearranging this, we have ...

  d = (101.65 -h)/tan(30°)

Equating these expressions for d, we can solve for h.

  (h -1.65)/tan(50°) = (101.65 -h)/tan(30°)

  h(1/tan(50°) +1/tan(30°)) = 101.65/tan(30°) +1.65/tan(50°)

We can divide by the coefficient of h and simplify to get ...

  h = (101.65·tan(50°) +1.65·tan(30°))/(tan(30°) +tan(50°))

  h ≈ 69.0148 ≈ 69.01 . . . . meters

The tip of the spire is 69.01 m above the plaza.

3 0
3 years ago
Galileo wanted to release a wooden ball and an iron ball from a height of 100 meters and measure the duration of their fall. He
ICE Princess25 [194]
For this case what you have is the same as a rectangle triangle where you have as data the degree of inclination of the hypotenuse with respect to the base and the height of the triangle.
 We have to find the value of the hypotenuse.
 For this we use the following trigonometric relationship:
 senx = C.O / h
 Where
 x: angle
 C.O: opposite leg
 h: hypotenuse.
 Substituting the values we have:
 sen (12) = 100 / h
 We cleared h:
 h = 100 / sin (12)
 h = 480.97 m
 Answer: 
 Galileo should walk 480.97 m up the inclined plane
5 0
4 years ago
A scientist begins an experiment with a culture of 5 bacteria cells. Every hour, the number of bacteria cells triples. Which equ
Liono4ka [1.6K]
Whichever one is 5*3^x.
4 0
3 years ago
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The histogram displays how many students are in each classroom during homeroom. What percentage of classrooms have 25 students o
Lelechka [254]

Answer:

its 40% but since it's not there it could be 45%

Step-by-step explanation:

hope this helps

3 0
3 years ago
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