1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mrs_skeptik [129]
3 years ago
12

How does knowing multiplication rules help solve problems faster and easier

Mathematics
2 answers:
Ivenika [448]3 years ago
8 0
I was about to say what the person said
KengaRu [80]3 years ago
3 0

Answer: It helps because you already know it off the top of your head and you are able to break up a multiplication problem step by step in your head.

Step-by-step explanation:

You might be interested in
Among the four northwestern states, Washington has 51% of the total population, Oregon has 30%, Idaho has 11%, and Montana has 8
morpeh [17]

Answer:

Step-by-step explanation:

H₀ : The distribution of the sample agrees with the population distribution.

H₁ : the distribution of the does not agree with the population distribution.

Using the  Chi-square test statistics

we will compute the expected frequencies

Now expected frequency for Washington will be

Fe = Npi = 1000×51% = 5100

expected frequency for Oregon

Fe = Npi = 1000×30% = 300

expected frequency for Idaho

Fe = Npi = 1000×11% = 110

expected frequency for  Montana

Fe = Npi = 1000×8% = 80

The Chi=square test statistics is;

x² = ∑ [ (Fo - Fe)² / Fe )

now we substitute

Given our Fo ( 450 in Washington, 340 in Oregon, 150 in Idaho, and 60 in Montana) from the question

x² =  (450-510)²/510 + (340-300)²/300 + (150-110)²/110 + (60-80)²/80

x²= 31.9376

so the chi-square test statistics is 31.9376

Now the chi-square critical value

first we compute for degree of freedom

d.f = k -1 = 4 - 1 = 3

So from the critical value table, degree of freedom 3 and significance level 0.05,

the chi-square critical value is 7.8147

Therefore chi-square test statistics 31.9376 is greater than the chi-square critical value 7.8147, so NULL HYPOTHESIS IS REJECTED at 5% significance.

There is sufficient evidence to warrant rejection  of the claim that the distribution of the sample agrees with the distribution of the state populations.

3 0
3 years ago
Find the area and circumference of the circle below:<br> Diameter - 14 cm
MAVERICK [17]

Answer:

<em>Area : 153.86cm</em>

<em>Circumference:  43.96cm</em>

Step-by-step explanation:

<u><em>To Find:</em></u>

<em>Area __ cm</em>

<em>Circumference__ cm</em>

<u><em>Given:</em></u>

<em>Since, it given that the Diameter is 14 cm</em>

<em>Diameter which is any straight line segment that passes through the center of the circle.</em>

<em>Radius which is half of diameter</em>

<u><em>Note: </em></u>

<em>A = πr  ²                                                          {Area Formula}</em>

<em>C = rd                                                           {Circumference Formula}</em>

<em>pi also known as π = 3.14                            {approximately }</em>

<em>"r " means Radius</em>

<em>"d " means diameter</em>

<em>c = circumference</em>

<em>a = area</em>

<u><em>Solve:</em></u>

<em>A = πr  ²</em>

<em>Since radius is half of the diameter then...</em>

<em>14/2 = 7</em>

<em>Radius = 7</em>

<em>A = 3.14(7)²                                   { (7)² means 7 × 7 </em><u><em>Not </em></u><em>7 × 2 }</em>

<em>A = 3.14(49)                                  { 7 × 7 = 49}</em>

<em>A = 153.86</em>

<em>C = rd       </em>

<em>C = 3.14(14)</em>

<em>C = 43.96</em>

<em>Area : 153.86cm</em>

<em>Circumference:  43.96cm</em>

<u>For More information:</u>

brainly.com/question/14068861

brainly.com/question/2407529

<u><em>~Kavinsky</em></u>

<em>    </em>

4 0
2 years ago
Read 2 more answers
What does (f(x)) mean in math for a input and output graph?
shtirl [24]

In maths, f (x) means as a special relationship where every single input has one output.

<u>Step-by-step explanation:</u>

In mathematics, a function is any expression that gives exactly one answer for each particular number. Input is the number provided in the expression, and output is the number obtained from the search or calculation.

In an ordered pair, input’s first number corresponds to the horizontal axis, and output’s second number in the vertical axis. These ordered pairs can then be plotted. Some data on the costs associated with this are called relationships. For example,

             f(x)=x^{2}

It is often written as "f (x)" where x is the input value and x^{2} is the output value.

3 0
3 years ago
Solve the equation, <br>-3|6n-2|+5=8
Marianna [84]
Hey..... Nice to see you :)
Let me help you out.

-3|6n -2| + 5 = 8
-3|6n -2| = 8-5
-3|6n -2| = 3
|6n -2| = 3/-3
|6n -2| = -1
Now, solve absolute value
No solutions.

Because absolute value cannot be less than 0.


I hope that's help !
5 0
3 years ago
Tough Math Help !
arsen [322]
Put 4 months over 12 months. Reduce to 1/3.

i=prt
i=300(0.9)(1/3)
i=$90
4 0
3 years ago
Other questions:
  • This table shows values that represent an exponential function.
    12·2 answers
  • Write a triple integral including limits of integration that gives the volume of the cap of the solid sphere x2+y2+z2≤5 cut off
    10·1 answer
  • Help me on both parts of b
    10·1 answer
  • Please help me!!!! You only have to answer number 1!!!
    9·1 answer
  • Who won the race between the two balls of string
    15·1 answer
  • Find the difference. (3 • 1,000) - (2• 100)
    9·1 answer
  • The length of human pregnancy is known to have a mean of 266 days and a standard deviation of 16 days. Based on records from a l
    12·1 answer
  • Name 3 pairs of adjacent angles and 3 pairs of vertical angles.​
    5·1 answer
  • Find the circumference of a circle in terms of u with a radius of 10 ft.
    7·2 answers
  • PLEASE HELP ASAP I FORGOT ABOUT THIS QUESTION AND THIS IT IS THE LAST QUESTION- LOL
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!