You can't make 5a + d -bc shorter, I will explain why. Let say a is an apple, d is ice cream and bc is an pineapple. You have 5 apples, 1 ice cream and you have lost you pineapple so it minus 1. You can't add everything because they are different thinks. You can only say I have 5 apple, 1 ice cream and minus one pineapple. So you can't make 5a + d -bc shorter because they are different
Answer:
look below :)
Step-by-step explanation:
First, combine like terms:
-10 = -14v + 14v
-10 = 0
So, there is no solution because both v representative numbers canceled each other out
Hope this helps :)
What is the equation of this line?
Answer:
D. Y = 4x-6
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Answer with explanation</u>
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Let 
be the average life of light bulbs.
As per given , we have
Null hypothesis : 
Alternative hypothesis : 
Since 
is right-tailed and population standard deviation is also known, so we perform right-tailed z-test.
Formula for Test statistic : 
where, n= sample size
= sample mean
= Population mean
=population standard deviation
For 
, we have
Using z-value table , Critical one-tailed test value for 0.06 significance level :
Decision : Since critical z value (1.5548) < test statistic (1.6180), so we reject the null hypothesis .
[We reject the null hypothesis when critical value is less than the test statistic value .]
Conclusion : We have enough evidence at 0.06 significance level to support the claim that the new filament yields a longer bulb life
