Answer:
12
Step-by-step explanation:
8.x-13=3+4.x
8.x-13=7.x
x-13+8=7.x
x-5=7.x
x-x=7+5
x-x=12
x=12
Answer:
3x-21
Step-by-step explanation:
3*x+3*(-7)=3x-21
The function is odd if you can replace every x with -x and get the oposite equation
example
if you replace x with -x in y=x^3, then you get -x^3, so therefor the functin is odd
so
replace x with -x
a. we get x^3+4, nope
b. we get -2x^3, yep
c. we get x^4-9, nope
d. we get x^4-4x, nope
answer is B
Answer:
A
Step-by-step explanation:
The equation of the horizontal line is y = 4 : x ≥ 0
the equation of the oblique line, since it passes through the origin is of the form
y = mx ( m is the slope )
to calculate m use the gradient formula
m = ( y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (- 1, - 2 ) ← 2 points on the line
m = = = 2
y = 2x : x < 0