SOLVE. 70 = -2.5xneed this asap

Mathematics

1 answer:

nalin [4]3 years ago

4 0

Answer:

-28

Step-by-step explanation:

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PLEASE HELP! A chemist is estimating the volume of a solution in a test tube. The actual volume of the solution is 33.4 ml. The

igomit [66]

Absolute error is actual- estimate=33.4-35=-1.6 that in percent can be found using a rule of three, we say that 33.4 is the 100% and we find the % for -1.6

33.4ml -------- 100%

-1.8ml-----------x

x=(-1.8)(100)/33.4

x=-5.4

the percentage error is -5.4%

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3 years ago

A standardized variable always has a mean of _______ and a standard deviation of _______. b. The z-score corresponding to an

Feliz [49]

Answer:

Step-by-step explanation:

We know that normal distribution as special characteristics such as symmetry, unimodal, no skewness, mean =median=mode, etc

A standardized variable for normal variable X is

$Z = \frac{x-\mu}{\sigma}$ will be normal with mean =0 and sigma =1

The probability will be divided equally on either side of the mean =0 i.e. y axis

Hence the answers would be

A standardized variable always has a mean of __0_____ and a standard deviation of ___1____. b. The z-score corresponding to an observed value of a variable tells you ____the std normal score.___. c. A positive z-score indicates that the observation is __to the right ____ the mean, whereas a negative z-score indicates that the observation is __to the left_____ the mean

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3 years ago

If a + b + c is cast 20 and a + b is equal to 14 , then c is what by process<br>

topjm [15]

Answer:

Step-by-step explanation:

$a + b + c = 20$