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Mathematics

1 answer:

expeople1 [14]3 years ago

8 0

Answer:

1.25

Step-by-step explanation:

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A line passes through the point (0, –1) and has a slope of -2/3 What is the equation of the line?

Troyanec [42]

The slope formula:
$y=mx+b$
m - a slopeb - y-intercept
We have:
$m=-\dfrac{2}{3}$ and point $(0;-1)\to b=-1$
Substitute:
$y=-\dfrac{2}{3}x-1$
Answer: A.

6 0

3 years ago

Write parametric equations of the line -3x+4y=7

trapecia [35]

Answer:

x = 1 + t and y = 2.5 + 0.75t

Step-by-step explanation:

Parametric equations are the equations in which the all the variables of the equation are written in terms of a single variable. For example in 2-D plane, the equation of the line is given by y=mx+c, there x is the independent variable, y is the dependent variable, m is the slope, and c is the y-intercept. The equation of the given line is -3x + 4y = 7. The goal is to convert the variables x and y in terms of a single variable t. First of all, take two points which lie on the line. By taking x=1, y comes out to be 2.5 and by taking x=0, y comes out to be 2.5. The general form of the straight line is given by:

(x, y) = (x0, y0) + t(x1-x0, y1-y0), where (x, y) is the general point, (x0, y0) is the fixed point, t is the parametric variable, and (x1-x0, y1-y0) is the slope.

Let (x0, y0) = (1, 2.5) and (x1, y1) = (0, 1.75). Substituting in the general equation gives:

(x, y) = (1, 2.5) + t(1, 0.75). This implies that x = 1 + t and y = 2.5 + 0.75t!!!

6 0

3 years ago

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A=2:b=5:c=? How do i find length of hypotenuse right angle triangles

FrozenT [24]

C equals eight because it is adding three

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3 years ago

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