<span>3ab-9ab+7ab = ab
</span><span>A-
2(5x-3)=24
10x - 6 = 24
10x = 30
x = 3
</span><span>B-
5(2x+1)=50
</span>10x + 5 = 50
10x = 45
x = 4.5
Answer:
(x - 3)² + (y + 5)² = 10
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Here (h, k) = (3, - 5 ) , then
(x - 3)² + (y - (- 5) )² = r² , that is
(x - 3)² + (y + 5)² = r²
r is the distance from the centre to a point on the line
Calculate r using the distance formula
r =
with (x₁, y₁ ) = (3, - 5) and (x₂, y₂ ) = (6, - 4)
r =
=
=
= ⇒ r² = ( )² = 10
(x - 3)² + (y + 5)² = 10 ← equation of circle
Answer:
c
Step-by-step explanation:
f( - 1) with x < 1 , then
f(- 1) = = = 1
f(1) with x ≥ 1 , then
f(1) = x + 1 = 1 + 1 = 2
Thus
f(- 1) + f(1) = 1 + 2 = 3 → c
Answer:
x is a solution
Step-by-step explanation:
X+14>5
Subtract 14 from each side
X+14-14>5-14
x > -9
Substitute the value in
6 >-9
This is true so x is a solution
Answer:
Step-by-step explanation:
f(2) = 0