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LiRa [457]
4 years ago
8

DUE BEFORE 5:OO!!!!!!

Mathematics
1 answer:
AleksAgata [21]4 years ago
6 0
X + y = 6
x - 6y = -9

Subtract the equations, you get:

y - (-6y) = 6 - (-9)
7y = 15

y = 15/7

x + 15/7 = 6
x + 15/7 = 42/7
x = (42-15)/7
x = 27/15

None of your answer choices are correct, since the solution to the systems of equation is (27/15, 15/7)
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From the point on the ground 500 ft from the base of a building, it is observed that the angle of elevation to the top of the bu
AveGali [126]

Answer:

  • building: 222.61 ft
  • flagpole: 32.15 ft

Step-by-step explanation:

The tangent function of an angle in a right triangle is the ratio of the opposite side to the adjacent side. Here, the adjacent side is 500 ft, so we have ...

  tan(24°) = (building height)/(500 ft)

  building height = (500 ft)tan(24°) ≈ 222.61 ft

__

Similarly, the height to the top of the flagpole is ...

  total height = (500 ft)tan(27°) ≈ 254.76 ft

The length of the flagpole is the difference of these heights:

  flagpole length = 254.76 ft -222.61 ft = 32.15 ft

The height of the building is 222.61 ft; the length of the flagpole is 32.15 ft.

5 0
3 years ago
Camelo has 3 less siblings than Benecio has. If camelo has 2 siblings, how many siblings does Benicia has.
Yuri [45]

Answer:

Benicia has5 siblings

Step-by-step explanation:

2+3=5

8 0
4 years ago
If sherry is 12 Luke is to times her age Emma is a half Luke's age how old is emma
cricket20 [7]
Emma is 12 years old
6 0
3 years ago
Read 2 more answers
What is the equation of a line that is perpendicular to y=4x-5 and passes through (-4,6)
lozanna [386]

Answer:

y=-1/4x+5

Step-by-step explanation:

perpendicular lines have slopes that multiply to -1.

Our given line:

y=4x-5

the slope (m) in it is 4. To find the slope of the perpendicular line:

4m=-1

divide by 4

m=-1/4

the slope of the new line is -1/4

here's our equation so far:

y=-1/4x+b

Since the line will pass through the point (-4,6) we can use it to solve for b (y intercept)

so substitute (-4,6) into the equation

6=-1/4(-4)+b

6=1+b

5=b

the y intercept is 5

so our equation is:

y=-1/4x+5

hope this helps! :D

4 0
3 years ago
The solutions to (x + 4) ^2- 2 = 7 are​
Alona [7]

Answer:

x = -1, -7

Step-by-step explanation:

(x+4)^2 -2 = 7

(x+4)^2 -9 = 0 (Taking 7 to the other side)

(x+4)^2 - 3^2 = 0

Now use the difference of two squares rule

[((x+4)+3).((x+4)-3)] = 0

[(x+7).(x+1)] = 0

Now solve for x

x = -1, -7

7 0
3 years ago
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