Answer:
third number line
Step-by-step explanation:
6.3r < -45.36
r < -7.2
it can't be the first two because those values are 71, 70 etc and we need 7.1, 7.2 etc
and r is less then -7.2
So it has to be the third one
Answer:
a = - 1
Step-by-step explanation:
given a quadratic in standard form : y = ax² + bx + c : a ≠ 0
Then the x-coordinate of the vertex is
•
= - 
The line of symmetry passes through the parabola, hence x-coordinate is 4
y = ax² + 8x - 3 is in standard form
with a = a, b = 8 and c = - 3, hence
-
= 4 ( multiply both sides by 2a
- 8 = 8a ( divide both sides by 8 )
a = - 1
Answer:
a) 8:3, b) no formula is there, c) 30
Step-by-step explanation:
because 200/75=8:3
because there formula being obtained
because 300/24=12.5
375/12.5=30
(-3,5)
X coordinate becomes negative