<h3>Solution for Line A and B:</h3>
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
Equation Form:
Does y=-4+3x^2 open upwards Or downwards
1 answer:
Answer:
Upwards
Step-by-step explanation:
The general form of a quadratic is
We can tell whether the curve opens upward or downward by the sign of "a"
If
- a is positive, the curve opens upward
- a is negative, the curve opens downward
Reaaranging the given equation:
Here, we see that a is positive, so the curve opens Upward
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Answer:
88 won and 66 lost
Step-by-step explanation:
Won = ×4 = 88 games
Lost = 154 - 88 = 66 games
Answer:
0.3520
Step-by-step explanation:
We have been given that the pulse rates among healthy adults are normally distributed with a mean of 80 beats/second and a standard deviation of 8 beats/second. We are asked to find the proportion of healthy adults have pulse rates that are more than 83 beats/sec.
First of all, we will find z-score corresponding to sample score of 83 as:
, where,
z = Z-score,
x = Sample score,
= Mean,
= Standard deviation.
Upon substituting our given values in z-score formula, we will get:
Now, we need to find the probability that a z-score is greater than 0.38.
Using formula , we will get:
Using normal distribution table, we will get:
Therefore, 0.3520 of healthy adults have pulse rates that are more than 83 beats/sec.