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
Lorico [155]
3 years ago
6

The difference between 3 times x and 4

Mathematics
1 answer:
kirill115 [55]3 years ago
3 0
3 times x = 3x

the difference between 3x and 4 mean that you need to subtract, so the answer is...

3x - 4


You might be interested in
Pls answer asap i need this answer quick plus the full explanation #8
vlada-n [284]
Please answer please please thank you
5 0
3 years ago
A grocery store sells a bag of 6 oranges for $4.20. If Ayden spent $2.80 on oranges, how many did he buy?
aleksley [76]

Answer:

4 oranges.

Step-by-step explanation:

First, you find the unit rate of cost per orange, which is $0.70, then divide that by $2.80.

5 0
4 years ago
A tuter promises to improve GMAT scores of students by more than 50 points after three lessons. To see if this is true, the tuto
creativ13 [48]

Answer:

t48 = 1.7500

Step-by-step explanation:

A paired t-test is used to compare two population means where you have two samples in  which observations in one sample can be paired with observations in the other sample. For example  if we have Before-and-after observations (This problem) we can use it.  

Let put some notation  

x=test value before , y = test value after  

The system of hypothesis for this case are:

Null hypothesis: \mu_y- \mu_x \geq 50

Alternative hypothesis: \mu_y -\mu_x >50

We have the mean difference  

\bar d= \frac{\sum_{i=1}^n d_i}{n}=53

And the sample standard deviation for the differences, is:

s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =12

Now we can calculate the statistic given by :

t=\frac{\bar d -\Delta}{\frac{s_d}{\sqrt{n}}}=\frac{53 -50}{\frac{12}{\sqrt{49}}}=1.75

Since we don't have the population standard deviaition we need to use the t distribution and we can calculate the degrees of freedom given by:

df=n-1=49-1=48

Now we can calculate the p value, since we have a right tailed test the p value is given by:

p_v =P(t_{(48)}>1.75) =0.0432

If we use a significance level of 5% we have that p_v, and on this case we reject the null hypothesis . And we don't have enough evidence to conclude that the difference of means it's higher than 50 points.

5 0
3 years ago
What percent is equivalent to 1/25<br> O 4%<br> O 5%<br> O 20%<br> O 25%
8_murik_8 [283]

Answer:

4%

Step-by-step explanation:

1/25 = 0.04 = 4%

5 0
3 years ago
Read 2 more answers
the expression 15n + 12n + 100 rersents the total cost in dollars for skis, boots and a lesson for n skiers. simplify the expres
ankoles [38]

Answer:

$316.

Step-by-step explanation:

The terms that have n can be operated:

15n +12n + 100 = 27n +100. Then, we have that

total cost = 27n +100 for n skiers. So, for 8 skiers we have

total cost = 27(8) +100 = 216 + 100 = 316.

Then, the total cost of 8 skiers is $316.

3 0
4 years ago
Read 2 more answers
Other questions:
  • Need this done soon plz
    12·1 answer
  • 23) The perimeter of a rectangular pool is 48 feet. The length
    9·1 answer
  • What type of reasoning starts with a given set of rules and conditions to determine what must be true?
    15·2 answers
  • Austin is baking apple pies and apple cakes. Each pie takes three times the number of apples as each cake. He plans to make 2 pi
    13·1 answer
  • If x=6z then 18z=3y, then x= ?
    13·1 answer
  • Need help with number 22-23. Math hw
    14·1 answer
  • You have 666 reindeer, Prancer, Rudy, Balthazar, Quentin, Jebediah, and Lancer, and you want to have 333 fly your sleigh. You al
    15·1 answer
  • Yo need some help please...
    15·2 answers
  • Please help me it’s important i attached an image of the graph
    10·1 answer
  • Hi Hi Hi HELP HELP HELP!!! ⚠️⚠️⚠️⚠️⚠️
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!