21= 1/4 x

28=1/3 x

what does x equal in both these has to equal the same number in both equations!

example:

45 divided by 6 equals 7
60 divided by 8 equals 7

! i’m not good with fractions

Mr. walker gave his class the function f(x) = (x + 3)(x + 5). four students made a claim about the function. each student’s claim is below. jeremiah: the y-intercept is at (15, 0). lindsay: the x-intercepts are at (–3, 0) and (5, 0). stephen: the vertex is at (–4, –1). alexis: the midpoint between the x-intercepts is at (4, 0). which student’s claim about the function is correct?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)