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weqwewe [10]
4 years ago
14

Need help learning how to solve math problems like this, can you explain b+4/7=-3

Mathematics
1 answer:
JulijaS [17]4 years ago
3 0
I'll do my best!

First step isolate the b. So for this one you want to subtract 4/7 from both sides. You end up with:
b=-3-4/7
or b=2.482571429or 17/7 in fraction form
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Tommy has a history test on Monday morning. He writes down the number of minutes he studies for the test each day for a week. Us
Schach [20]
To find the average, add up all the numbers, then divide that answer by the quantity of numbers.

STEP 1:
add all numbers

=30 + 20 + 0 + 0 + 0 + 0 + 120
=170 total


STEP 2:
divide total from step 1 by 7 (total quantity of numbers given, including zeros)

=170 ÷ 7
=24.2857
=24.3 rounded to nearest tenth


***You could also calculate the average by adding only non-zero results (20,30,120) and then dividing by 3 (the quantity of only non-zero numbers).


ANSWER: The average number of minutes studied per day is 24.3.

Hope this helps! :)
7 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5x%20-%209%7D%7B2%7D%20" id="TexFormula1" title=" \frac{5x - 9}{2} " alt=" \frac{
fenix001 [56]
I hope this helps you 5x-9=2.(2x+3) 5x-9=4x+6 x=6+9 x=15
5 0
3 years ago
Umder what conditions can you use a normal distribution to approximate the binomial distrubution
Shtirlitz [24]

Answer:

See Below

Step-by-step explanation:

A <u>binomial distribution</u> is basically the probability of success of failure of an experiment that is repeated many times.

The parameters are "n" and "p".

Where

n is the number of times the experiment is performed, or the number of trials

p is the probability of success

Note: "q" is the probability of failure, or q = 1 - p

** Binomial Distribution is a discrete distribution

A normal distribution is a continuous distribution that is symmetric about the mean. That means, the data closer to mean occurs more frequently.

At times, we can use normal distribution to approximate a binomial distribution. The conditions can be said as:

<u>" we can approximate a binomial distribution using normal distribution when n is large enough "</u>

How large is large enough?

There isn't a precise answer, but we can take a rule of thumb as

If "n*p" and "n*q" is greater than 10, we can say the sample size, or n, is large enough.

We can approximate when this is less than 10 per say, but the approximation won't be that good. So, the more the value is greater than 10, the better the approximation.

6 0
3 years ago
-5(-× -6) =31<br> Solve the equation
faust18 [17]

Answer: I believe the answer to this question is: X= 1/5.

6 0
4 years ago
I WILL GIVE BRAINLIEST IF CORRECT The area of a square is 49 square centimeters. Find the length of a side. Find the length of t
Bingel [31]

Answer: 7

Step-by-step explanation:

Since squares have the same side lengths

then you need to find a number that multiplies twice that equals 49

7*7 = 49

8 0
3 years ago
Read 2 more answers
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