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Dmitry [639]
3 years ago
13

What is the multiplicative inverse of the number 5?

Mathematics
1 answer:
Andrew [12]3 years ago
6 0

Answer:

1/5

Step-by-step explanation:

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Question 3 (20points)<br> Solve the quadratic equation using the quadratic<br> -x2+8x=7
Angelina_Jolie [31]

Answer:

x = 7 or x = 1

Step-by-step explanation:

For this equation: a=-1, b=8, c=-7

−1x2+8x+−7=0

Step 1: Use quadratic formula with a=-1, b=8, c=-7.

x=  ( −b±√b2−4ac )/2a

x= (−(8)±√(8)2−4(−1)(−7))/ (2(−1) )

x=  (−8±√36 )/-2

x=1 or x=7

3 0
3 years ago
Use a coterminal angle to find the exact value of the expression. Do not use a calculator.
melamori03 [73]
<span>c. 
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5 0
3 years ago
Lower perfect square root of <br><br>18​
sammy [17]
The lower square root would be 4.2
7 0
3 years ago
Read 2 more answers
Ruby has a bird feeder which is visited by an average of 13 birds every 2 hours during daylight hours. What is the probability t
zalisa [80]

Answer:

62.93%

Step-by-step explanation:

We have to solve it by a Poisson distribution, where:

p (x = n) = e ^ (- l) * l ^ (x) / x!

Where he would come being the number of birds that there would be in 40 minutes, we know that in 2 hours, that is 120 minutes there are 13, therefore in 40 there would be:

l = 13 * 40/120

l = 4,333

Now, we have p (x> 3) and that is equal to:

p (x> 3) = 1 - p (x <= 3)

So, we calculate the probability from 0 to 3:

 p (x = 0) = 2.72 ^ (- 4.33) * 4.33 ^ (0) / 0! = 0.01313

p (x = 1) = 2.72 ^ (- 4.33) * 4.33 ^ (1) / 1! = 0.0568

p (x = 2) = 2.72 ^ (- 4.33) * 4.33 ^ (2) / 2! = 0.12310

p (x = 3) = 2.72 ^ (- 4.33) * 4.33 ^ (3) / 3! = 0.17767

If we add each one:

0.01313 + 0.0568 + 0.12310 + 0.17767 = 0.3707

replacing:

p (x> 3) = 1 - 0.3707

p (x> 3) = 0.6293

Which means that the probability is 62.93%

5 0
3 years ago
Find the length of the missing side. Leave your answer in simplest radical form.
malfutka [58]
Solve for hypotenuse

Hypotenuse = \sqrt{a^{2}+b^{2}}

Substitute 3 for A and 4 for B
\sqrt{3^{2}+4^{2}}

Solve exponents
3^2 = 9
4^2 = 16
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Add
9 + 16 = 25
\sqrt{25}

Solve square root
\sqrt{25} = 5
5 is your answer
5 0
3 years ago
Read 2 more answers
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