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Mila [183]
2 years ago
5

Solve the proportion 2/z-5=z/0.5zpower2+7 A.1/5 B.6 C.-7/5 D.-14/5

Mathematics
1 answer:
stiv31 [10]2 years ago
5 0
2 / (z-5) = z / (0.5z^2 + 7)
cross multiply
z(z - 5) = 2(0.5z^2 + 7) =
z^2 - 5z = z^2 + 14 = 
z^2 - z^2 - 5z = 14
-5z = 14
z = -14/5
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Answer quick please!
Mashcka [7]

B because B is the answer

7 0
2 years ago
Which of the following equations describes the line shown below? Check all<br> that apply.
scoundrel [369]

Answer:

B. y = 2x - 2

E. y + 4 = 2(x + 1)

F. y - 6 = 2(x - 4)

Step-by-step explanation:

The equation of the line can be found using either the point-slope equation or the slope-intercept equation.

✔️Equation of the line in point-slope using the slope and the coordinates of the point (4, 6):

Slope = m = change in y/change in x

Using (4, 6) and (-1, -4),

m = (-4 - 6)/(-1 - 4)

m = -10/-5

m = 2

Substitute m = 2, and (a, b) = (4, 6) into the point-slope equation form y - b = m(x - a)

Thus:

y - 6 = 2(x - 4)

✔️Equation of the line in point-slope using the slope and the coordinates of the point (-1, -4):

Slope = m = 2

Substitute m = 2, and (a, b) = (-1, -4) into the point-slope equation form y - b = m(x - a)

Thus:

y - (-4) = 2(x - (-1))

y + 4 = 2(x + 1)

✔️Equation of the line in slope-intercept form, y = mx + b

Where,

m = slope = 2

b = y-intercept = -2 (the point where the line intercepts the y-axis)

Thus, substitute m = 2 and b = -2 into y = mx + b

y = 2x + (-2)

y = 2x - 2

6 0
3 years ago
A line segment is formed by connecting two points located at (-4,2) and (2,-1). What is the slope of this line segment? A.-3/8 B
Scorpion4ik [409]
The formula for slope is 
m= (y₂-y₁)/(x₂-x₁)
you can plug in the points that you are given to find the slope
m= (-1-2)/(2-(-4)
m= -3/6

the slope is -3/6 which reduced to -1/2

so the answer would be 
c) -1/2

hope this helped!
3 0
3 years ago
Y - 5 = 3/2(x+2) using that for a fraction write an equation in sloped intercept form
Licemer1 [7]
In slope intercept form this is equal to y=3/2x+8. If you want it in decimal form it would be y=1.5x+8.
8 0
3 years ago
I need help with number 18 who can help
DiKsa [7]
(86.8 - 3n)/4

You can get this by combining the two. Make sure to give common denominators. 
4 0
3 years ago
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