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morpeh [17]
2 years ago
8

8th grade geometry (triangles), WILL GIVE BRAINLIEST TO THE ONE WHO EXPLAINS HOW THEY CAME TO THE RIGHT ANSWER :))

Mathematics
2 answers:
attashe74 [19]2 years ago
7 0

Answer:

It is either a or d.

Step-by-step explanation:Because even without knowing the lengths, you can tell that b+c is definitely bigger than a, and a+b is definitely bigger than c. So I guess you will just have to take your chances and guess.

Alexus [3.1K]2 years ago
3 0
It is a. A right triangle is proven to be a right triangle with its right angle. Line a and c forms the right angle. C and b are much longer than a, so it is fair to assume that their measurements are a bigger number. It can’t be b, because b + c < a doesn’t make sense as a is the smallest side and b and c are longer. C doesn’t make sense, as side b is longer than c. D doesn’t make sense as the triangle theorem states that the sum of two sides has to be greater than the longest side for it to be a triangle. This is obviously a triangle. So your final answer is a.
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The lifetime of a battery in a certain application is normally distributed with mean μ = 16 hours and standard deviation σ = 2 h
DaniilM [7]

Answer:

Probability that a battery will last more than 19 hours is 0.0668.

Step-by-step explanation:

We are given that the lifetime of a battery in a certain application is normally distributed with mean μ = 16 hours and standard deviation σ = 2 hours.

<em>Let X = lifetime of a battery in a certain application</em>

So, X ~ N(\mu=16,\sigma^{2} =2^{2})

The z-score probability distribution for normal distribution is given by;

               Z = \frac{  X -\mu}{\sigma}  ~ N(0,1)

where, \mu = mean lifetime = 16 hours

            \sigma = standard deviation = 2 hours

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

So, the probability that a battery will last more than 19 hours is given by = P(X > 19 hours)

  P(X > 19) = P( \frac{  X -\mu}{\sigma} > \frac{19-16}{2} ) = P(Z > 1.50) = 1 - P(Z \leq 1.50)

                                              = 1 - 0.9332 = 0.0668

<em>Now, in the z table the P(Z </em>\leq<em> x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 1.50 in the z table which has an area of 0.9332.</em>

Hence, the probability that a battery will last more than 19 hours is 0.0668.

5 0
3 years ago
Solve for y 4.2x - 1.4y = 2.1
NeX [460]
4.2x - 1.4y = 2.1
-1.4y = -4.2x + 2.1
y = (-4.2/-1.4)x + 2.1/-1.4
y = 3x - 1.5 <==
3 0
3 years ago
Read 2 more answers
The cost of a company picnic varies directly as the number of employees attending the picnic. If a company picnic costs $487.50
Drupady [299]

The company picnic cost $ 1300 for 80 employees

<em><u>Solution:</u></em>

Given that cost of a company picnic varies directly as the number of employees attending the picnic

Let "c" be the company picnic cost

Let "n" be the number of employees attending the picnic

Therefore,

cost \propto \text{ number of employees attending picnic }

c \propto n\\\\c = kn

Where "k" is the constant of proportionality

c = kn ---------- eqn 1

<em><u>Given that company picnic costs $487.50 for 30 employees</u></em>

Therefore substitute c = 487.50 and n = 30

487.50 = k(30)\\\\k = \frac{487.50}{30} = 16.25

<em><u>How much does a company picnic cost for 80 employees?</u></em>

Substitute n = 80 and k = 16.25 in eqn 1

c = 16.25(80) = 1300

Thus $ 1300 is the cost for 80 employees

5 0
3 years ago
How many unit tiles need to added to the expression x^2+4x+3 to form the perfect square trinomial?
Nuetrik [128]

x^2 + 4x + 3 + 1 = (x + 2)^2

So 1 need to be added.

7 0
2 years ago
Please help ASAP!! Will give brainliest to correct answer!
snow_lady [41]

Answer:

2/4

Step-by-step explanation:

4 0
3 years ago
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