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2 years ago

Help me i need it i will give brainlest

Mathematics

1 answer:

KatRina [158]2 years ago

4 0

Answer:

a = 5.3

Step-by-step explanation:

Plug the length of the other two sides into the Pythagorean Theorem and solve.

a² + b² = c²

a² + 6² = 8²

a² + 36 = 64

a² = 28

a = √28

a = 5.291502622 ⇒ 5.3 (to the nearest tenth)

The length of "a" is 5.3.

Hope that helps.

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Give the center, radius, and equation of the circle in the graph.

dexar [7]

Answer:

$(x-2)^2+(y+3)^2=4$

Step-by-step explanation:

A circle's equation consist on the following expression: $(x-a)^2+(y-b)^2=r^2$ , where r is the magnitude of the radio, and (a,b) are the coordenates of the center of the circle.
In this case, a=2 and b= - 3, because the circle is centered in (x,y)=(2, - 3).
The radio, which is the distance between the center of the radio to any point in its border, equals r=2 (because of the scale of the graphic, in this case two squares of the grid equal 2 units, then r=2).
Finally, using the previous information to replace in the equation $(x-2)^2+(y+3)^2=4$ , where the fact that r=2 and $2^2=4$ was used.

3 0

2 years ago

Jake has a bag of 50 beads, some of which are blue and the remaining are green. Jake randomly pulls out a bead from the bag, rec

noname [10]

Answer:

The answer is 40 because you have a ratio of 4:1 (16:4). If you multiply by ten, it becomes 40:10.

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Simplify the given exponential expression.

Andrews [41]

The rule for multiplying similar bases with exponents is:

(a^b)*(a^c)=a^(b+c)

In this case you have:

(x^9)(x^2)

x^(9+2)

x^11

6 0

3 years ago

Read 2 more answers

Plz help and show ur work❤️

Sergio039 [100]

Answer:

20 x

Step-by-step explanation:

i hope that is it

3 0

3 years ago

According to a 2010 study conducted by the Toronto-based social media analytics firm Sysomos, 71% of all tweets get no reaction.

klemol [59]

Answer:

a) the expected number of tweets with no reaction is 71 tweets

b) the variance is 20.59 tweets² ( ≈ 21 tweets )and the standard deviation is

4.537 tweets (≈ 5 tweets)

Step-by-step explanation:

we can use the binomial probability distribution

P(x, N, p ) = N!/[(N-x)!x!] * p^x * (1-p)^(N-x)

where

x = number of successful events

N = population total

p = probability for success for every individual and independent event

P = probability for x successful events

in our case p = 71% = 71/100 (probability of a tweet without reaction) , N = 100 tweets

a) the expected number of tweets

E(x) = N* p = 100 tweets * 71/100 = 71 tweets

b) the variance is

V(x) = N * p * (1-p)

V = 100 * 71/100 * (1-71/100) = 71* 29/100 = 20.59 tweets² ( units of variance are [N²] )

the standard deviation is

s = √V = √20.59 tweets² = 4.537 tweets

6 0

2 years ago