Answer:
x=-3
Step-by-step explanation:
The quadratic function
determines the parabola which has the vertex at point (-3,5). The axis of symmetry passes through the vertex and is parallel to the y-axis. Hence, its equation is x=-3 (see attached diagram).
Answer:
a=7, b=14
Step-by-step explanation:
a. 2/6=x/21
cross multiply=
2×21=x×6
then solve
42=6x
divide both sides by 6
x=42/6=<u>7</u>
b. 150/84=25/x
cross multiply=
84×25=150×x
then solve
2100=150x
divide both sides by 150
x=2100/150=<u>1</u><u>4</u>
<u> </u><u> </u><u> </u><u> </u><u>H</u><u>O</u><u>P</u><u>E</u><u> </u><u>T</u><u>H</u><u>I</u><u>S</u><u> </u><u>H</u><u>E</u><u>L</u><u>P</u><u>S</u><u>.</u><u> </u><u> </u><u> </u>
Options are not provided but if range of √mx and m√x are same then m must be greater than or equal to 0. ( m ≥ 0 )
Because if m is negative then m√x would be flipped over x-axis but √mx will be flipped over y-axis which cause different ranges.
So m ≥ 0 must be true.
Hope this helps.
The fourth answer (D) is correct because it cannot be expressed as a fraction.