Question 2 help meeee pleaseee Thank you

Mathematics

1 answer:

Paladinen [302]2 years ago

8 0

3 cm/h easy peasy

Step-by-step explanation:

12 cm in 4 hrs
For 1 cm : 12/4 = 3 cm

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write an equation in point slope form of the line that passes through the point (-8,-2) and had a slope of m=5

Ede4ka [16]

Answer:

5x - y + 38 = 0

Step-by-step explanation:

solution:

slope(m) = 5

(x1 , y1) = (-8 , -2)

we know that,

(y - y1) = m(x -x1)

or, (y - -2) = 5(x - -8)

or, y+2 = 5(x + 8)

or, y+2 = 5x +40

or, 5x - y + 38 = 0 is the required equation

3 0

3 years ago

Given f(x)=8x^5, find f^-1(x) <br> Then state whether f^1(x) is a function.

irina1246 [14]

Answer:

f^-1(x) = (x/8)^(1/5) is a function

Step-by-step explanation:

The inverse of a function is the function reflected across the line y=x. This results in the coordinate points (x,y) of the function becoming (y,x) for the inverse function. Algebraically to find the inverse, switch the x and y locations and solve for y.

y = 8x^5

x = 8y^5

x/8 = y^5

(5)√(x/8) = y

This is a fifth root of (x/7) also written in exponents as y = (x/8)^(1/5).

This is a function. While it appears not to be a function because the middle portion over the origin appears vertical, it is a function because the middle portion over the origin is changing and graphing software shows it has no input with more than one output. Without graphing software you would rule it is not a function.

6 0

3 years ago

If the class mark and class size of the class

Gemiola [76]

Answer:

The class interval is: 20-30

Step-by-step explanation:

Let l be the lower class limit and u be the upper class limit.

Then according to given statement that class mark is 25

$\frac{l+u}{2} = 25\\l+u = 50\ \ \ Eqn\ 1$