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mars1129 [50]
2 years ago
5

Solve the following multistep equations for x. Check your answers.

Mathematics
1 answer:
Bumek [7]2 years ago
6 0

Answer:

-2(x + 3) = -10

x=2

x + 4 = 2x + 9

x=-5

5x – 17 = 2(1 - 7x)

x=1

Step-by-step explanation:

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The scale of a map is 1:40000. What distance on the map represents a real distance of 5km?​
Rufina [12.5K]

Answer:

0.125

Step-by-step explanation:

1=40000

x-5000

x=5000÷40000=1/8=0.125

6 0
3 years ago
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Arisa [49]

Answer:

y = - 24/7

Step-by-step explanation:

Hope this helps!

5 0
3 years ago
Read 2 more answers
Consider the probability that fewer than 26 out of 107 cell phone calls will be disconnected. Assume the probability that a give
anyanavicka [17]

Answer:

We assume the condition of independence satisifed.

We need to check the following conditions in order to use the normal approximation.

np=107*0.98=104.86 \geq 10

n(1-p)=107*(1-0.98)=2.14 < 10

So we see that we satisfy the first condition, but the second no so then we can't apply the approximation for this case, since we need both conditions at the same time in order to use the normal approximation.

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=107, p=0.98)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Solution to the problem

We assume the condition of independence satisifed.

We need to check the following conditions in order to use the normal approximation.

np=107*0.98=104.86 \geq 10

n(1-p)=107*(1-0.98)=2.14 < 10

So we see that we satisfy the first condition, but the second no so then we can't apply the approximation for this case, since we need both conditions at the same time in order to use the normal approximation.

4 0
3 years ago
Determine which letter best shows the location of the fraction.
Crank
Is there an imagine you forgot to attach to the question? would love to help but i don’t see any options :(
7 0
3 years ago
Tony had $360 in his savings account. His bank wants to make two transactions. A withdrawal as -$45 and a deposit as $25.What is
romanna [79]

Answer:

His balance will be $340.

Step-by-step explanation:

1.) 360-45=315

- You do this because when you make a withdrawal you are removing a specific amount of money from your account. In this example you are making a withdrawal (removing) of $45 from your account of $360.

2.) 315+25=340

- You did this because a deposit is a specific amount of money you are adding. In this example you are depositing (adding) $25 to your new total of $315.

8 0
3 years ago
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