Answer:
Hello there do you need help, if so what is he problem:)
Step-by-step explanation:
the least common multiple of 14, 15, amd 16 is 1680
No Sophie made a mistake going from step one to two. (She should’ve multiplied 9*2 and 6*7 instead of dividing first, she didn’t follow PEMDAS)
Answer:

Step-by-step explanation:

Add 4 to both sides:


Subtract 2x from both sides:


Divide both sides by -1:


Answer:
Given
(X+1)²+(y+4)² =25
or, {x-(-1)}² +{y-(-4)}² =5²
comparing with (x-h)²+(y-k)² = r²
h= -1
k= -4
center of circle (h,k)= (-1,-4)
by question..
(a,b) is centre of circle so...
(a,b) =(-1,-4)
i.e
a=-1
b=-4
now;
a+b= -1+(-4)
= -1-4
= -5