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IRISSAK [1]
2 years ago
12

On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a

heart attack. The doctors told her that the reliability of the stress test is 67%. The test predicted that Erin will not have a heart attack. What is the probability after the test was taken that she will have a heart attack? 0.4051 0.5010 0.4653 0.6632 NextReset
Mathematics
1 answer:
andriy [413]2 years ago
7 0
I believe it is <span>0.5010 but sorry if i'm wrong.</span>
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2 years ago
A line passes through the point (–2, 7) and has a slope of –5.
kakasveta [241]

Answer:

it is -7 because the 2 make it like that

Step-by-step explanation:

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3 years ago
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A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the
kenny6666 [7]

Given:

The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the given equation

y=-29x^2+1388x-10040

To find:

The maximum amount of profit the company can make, to the nearest dollar.

Solution:

If a quadratic equation is f(x)=ax^2+bx+c, then the vertex is

Vertex=\left(-\dfrac{b}{2a},f(-\dfrac{b}{2a})\right)

If a>0, then vertex is the minimum point and if a<0, then the vertex is the maximum point.

We have,

y=-29x^2+1388x-10040

Here, a=-29,b=1388, c=-10040. Clearly, a<0. So, the vertex is the point of maxima.

-\dfrac{b}{2a}=-\dfrac{1388}{2(-29)}

-\dfrac{b}{2a}=-\dfrac{1388}{-58}

-\dfrac{b}{2a}\approx 23.931

Putting x=23.931 in the given equation, we get

y=-29(23.931)^2+1388(23.931)-10040

y=-16608.09+33216.228-10040

y=6568.138

The vertex is at (23.931,6568.138).

Therefore, the maximum profit is $6568.138 when x=23.931.

5 0
2 years ago
PLZ ! PLZ! PLZ!
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Answer: Yes they could.

Step-by-step explanation:

The two pairs of sides given are proportional: 3/7 : 9/21

The two triangles have the side:side ratio, meaning they are similar

Because they are similar, their hypotenuses <em>could</em> lie along the same line, not guaranteed, but possible.

3 0
3 years ago
3a+7+2(3+a) simpilify
Vladimir [108]

Answer: The answer is 5a+13

Step-by-step explanation:

6 0
3 years ago
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