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2 years ago

Which expression has a negative value? A) B)−1×2×−3×4×−5 C)1×−2×−3×−4×−5 D)1×−2×3×−4×5

Mathematics

1 answer:

MArishka [77]2 years ago

6 0

Answer:

Step-by-step explanation:

B) -1*2*-3*4*-5=-2*-3*4*-5=6*4*-5=24*-5=-120

C) 1*-2*-3*-4*-5=-2*-3*-4*-5=6*-4*-5=-24*-5=120

D) 1*-2*3*-4*5=-2*3*-4*5=-6*-4*5=24*5=120

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The mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. what is the probability that an indiv

Usimov [2.4K]

Less than 3 is about 10.75% and greater than 13 is about 6.18%.

To find these percents, you need to find the z-score for each value. Then, use your table to find the correct percent. Be sure to find the side above 13 when you use your chart.

For less than 3:
(3 - 7.45) / 3.6 = -1.24 = The percent below this is 0.1075

For greater than 13:
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2 years ago

Consider college officials in admissions registration, counseling, financial aid campus ministry, food services, and so on. How

andre [41]

Since sample size is > 40, we use the z-score in calculating for the confidence interval.

The formula is given as:

Confidence Interval = X ± z * σ / sqrt (n)

Where,

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3 years ago

Which number is not equivalent to others? 0.5 1/5 5/25 20%

CaHeK987 [17]

Answer: .5

Step-by-step explanation:

1/5 = 20%

5/25=20%

.5= 50%

Hope this helps!

6 0

3 years ago

On a coordinate plane, a parabola opens up. It goes through (negative 7.5, 4), has a vertex of (negative 3, negative 9), and goe

morpeh [17]

Answer:

f(-3) = -9.

Step-by-step explanation:

The equation of the curve in vertex form is:

f(x) = a(x + 3)^2 - 9 a is positive as the parabola opens up.

It passes through the point (1.5, 4), so

4 = a(1.5 + 3)^2 - 9

20.25a = 13

a = 13/20.25

a = 0.6420.

So the equation of the graph is

0.6420(x + 3)^2 - 9.

f(-3) = 0.6420(-3 + 3)^2 - 9

= 0.642*0 - 9.

= -9.

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2 years ago

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romanna [79]

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