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2 years ago

PLEASE HELP IM STRUGGLING AND IM FAILING GEOMETRY

Mathematics

1 answer:

Vlad1618 [11]2 years ago

8 0

Answer:

2.6 m

Step-by-step explanation:

The surface area for rectangular prisms is: S = 2lw + 2lh + 2wh, where l = length, w = width, h = height.

Substitute the known values into this equation: h = 5, l = 10, w = x, S = 178

178 = 2(10x) + 2(5 x 10) + 2 (5x)

Simplify!

178 = 20x + 100 + 10x

Subtract 100 from both sides and combine x's

78 = 30x

divide both sides by 30

x = 2.6 m

answer check: 2(10 x 2.6) + 2(5 x 10) + 2 (5 x 2.6) = 178 (true!)

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HELPPP ASAPPPPP MARKING BRAINLIEST JUST 14

My name is Ann [436]

8x-6 is what I’m looking for. Its d.

The answer is d its also 8x-6 it matches and is equivalent.

Hope this helps, have a wonderful day ❣️

4 0

3 years ago

Suppose that you randomly draw one card from a standard deck of 52 cards. After writing down which card was drawn, you replace t

34kurt

Answer:

The probability is 0.0775

The expected value is 4.75 clubs

The standard deviation is 1.8875 clubs

Step-by-step explanation:

The variable X follows a binomial distribution, because we have n identical and independent events (19 cards) with a probability p of success and 1-p of fail (there is a probability of 1/4 to be club and 3/4 to be diamond, heart or spade). Then, the probability that x of the n cards are club is:

$P(x)=\frac{n!}{x!(n-x)!}*p^{x}*(1-p)^{n-x}\\P(x)=\frac{19!}{x!(19-x)!}*0.25^{x}*(0.75)^{19-x}$

So, the probability P of drawing at least 8 clubs is:

P = P(8) + P(9) + P(10) + ... + P(18) + P(19)

Replacing, the values of x, from 8 to 19, on the equation above, we get:

P = 0.0775

Additionally, the expected value E(x) and standard deviationS(x) for this distribution is given by:

E(x)=np = 19(0.25) = 4.75

$S(x)=\sqrt{np(1-p)} =\sqrt{19(0.25)(0.75)} =1.8875$

8 0

4 years ago

Ms. Walker's class set up an online fund with a goal to raise $1,280 to go on a field trip. Ms. Walker starts the fund by deposi

madreJ [45]

What you can use for this case is a function of the potential type.
We have then
y = a (b) ^ x
Where we have:
Walker starts the fund by depositing $ 5
a = 5
Each week the balance of the fund is twice the balance of the previous week:
b = 2
The function is:
y = 5 (2) ^ x
The number of weeks to reach $ 1280 is 8 weeks.
Check:
y = 5 (2) ^ 8
y = 1280
Answer:
An equation can be used to find the number of weeks, x, after which the balance of the fund will reach $ 1,280 is:
y = 5 (2) ^ x
The number of weeks that it takes to reach the class goal is
8 weeks

4 0

4 years ago

Read 2 more answers

What is the explicit rule for the pattern 16,11,6,1...

svlad2 [7]

Answer:

the explicit rule is the difference, which is -5.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Omg please help!!!!! And fast if you can