|3x+1|=4 : x=−
5
3 or x=1
Pasos
|3x+1|=4
Aplicar las propiedades de los valores absolutos: Pi |u| = a, a>0 entonces u = a or u = −a
3x+1=−4 or 3x+1=4
Mostrar pasos
3x+1=−4 or 3x+1=4
Answer:
c edge
Step-by-step explanation:
Answer:
738 messages
Step-by-step explanation:
Use the given information to set up an equation. 7 is constant and 0.3 per message, with a total of 18.40.
0.3x + 7 = 18.4
Now solve for x
0.3x = 11.4
x = 38
She sent 38 messages over the standard 700, meaning she sent a total of 738 messages in the month of October
<h2>
Answer with explanation:</h2>
Let
be the average starting salary ( in dollars).
As per given , we have

Since
is left-tailed , so our test is a left-tailed test.
WE assume that the starting salary follows normal distribution .
Since population standard deviation is unknown and sample size is small so we use t-test.
Test statistic :
, where n= sample size ,
= sample mean , s = sample standard deviation.
Here , n= 15 ,
, s= 225
Then, 
Degree of freedom = n-1=14
The critical t-value for significance level α = 0.01 and degree of freedom 14 is 2.62.
Decision : Since the absolute calculated t-value (2.07) is less than the critical t-value., so we cannot reject the null hypothesis.
Conclusion : We do not have sufficient evidence at 1 % level of significance to support the claim that the average starting salary of the graduates is significantly less that $42,000.
Answer:
d = 3h - 6
Step-by-step explanation:
Given
h =
+ 2 ( subtract 2 from both sides )
h - 2 =
( multiply both sides by 3 )
3(h - 2) = d , that is
d = 3h - 6