from first equation x = 7 + 2y. Substitute this into second equation:-
2(7 + 2y) + 5y = 5
9y = -14 + 5 = -9
y = -1
Plug this into the first equayion
x - 2(-1) = 7
x = 5
Answer is x = 5, y = -1 .
Answer:
b. We do not have enough information to make a conclusion.
Step-by-step explanation:
For testing difference of means our null hypothesis and alternative hypothesis is
H0: There is no significant difference between the average packing time of old machine and new machine i.e. μold-μnew=0.
Ha:There is significant difference between the average packing time of old machine and new machine i.e. μold-μnew≠0.
When the confidence contains the null values then there is no significant difference exists. Here the specified null value is 0. A 95% confidence interval (-6.85, 0.34) shows that it contains null value so, there is no significant difference between the average packing time of the two machines at 5% level of significance. This results is for 95% confidence interval. For 90% confidence interval result may vary and we don't have sufficient information given to compute 90% confidence interval.
C is the correct answer because that's the only answer where all the numbers (i.e. 3, -1, 2) all, when plugged into the function, equal 0. For example:
3³ - (4 × 3²) + 3 + 6 = 0
-1³ - (4 × (-1)²) + (-1) + 6 = 0
2³ - (4 × 2²) + 2 + 6 = 0
As we see, everything adds up to 0. So, C is the correct answer.
= 5+ (5x+20)<20
5x +25<20
5x< -5
x< -1
Step-by-step explanation:
so you divide
so each t-shirt costs 4$