Answer:
domain: {x | x is a real number}
range: {y l y> -8}
Step-by-step explanation:
f(x) = 4x² – 8 is a parabola, a U shape.
Since the stretch factor, 4, is positive, it opens up, there it will have a minimum value, the lowest point in the parabola.
y > -8 because the minimum is -8.
Parabolas do not have restricted "x" values. "4" does not restrict x because it is the stretch factor, which determines how wide the parabola is.
Quadratic standard form:
f(x) = ax² + bx + c
"a" represents how wide the graph is. If it's negative it opens down, if it's positive it opens up.
"b", if written, tells you it is not centred on the y-axis. It is not written, so the vertex is on the y-axis.
"c" is the y-intercept. In this case, since b = 0, it is also the minimum value.
Answer: 8 37/40
Step-by-step explanation:
Divide 357 by 40!?
Answer:
A.
Step-by-step explanation:
1. Add all the seeds to get the denominator, or sample size.
56+78 = 134
2. Determine what you are finding to get the numerator
Turnips = 56
3. Write as fraction 56/134
4. Solve for probability.
5. 0.42
Answer:
/
Step-by-step explanation:
Answer:
B: y=cos(x) - 2
Step-by-step explanation:
You can use a graphing calc, write out a table, or use your knowledge. In this case, I will use my knowledge.
You can automatically rule out any answers with <em>sine </em>because the sin graph will never start at y=1 when x=0 (remember the unit circle and parent graphs), so rule out A. Since the graph shown is a transformation of only vertical from <em>y=cos(x)</em>, you can rule out C as well. Now you are left with B and D. B is the correct answer because if you chose D, the value for when x=0 would be y=0, while the value for x=0 for B would be y=-1, which is what you want.