Emma is always. When solving, you use the PEMDAS method going from left to right.

Your equation would be something like " -2 * -2 * 4"
Because you would start with (-2 * -2) = 4 and then move to 4 * 4 = 16

If your equation were something like " -2 * 3 * -2"
You would do -2 * 3 = -6 and then move to -6 * -2 = 12

Remember "Two negatives = a positive"

8 0

3 years ago

Quality control finds on average that 0.026% of the items from a certain factory are detective. One month, 4000 items are checke

telo118 [61]

Given that 4000 items are checked in one month, let the number of detective items be represented as y.

Quality control finds on average that 0.026% of the items in the factory are detective. This implies that

$\text{Number of }\det ective\text{ items = }\frac{\text{0.026}}{100}\times\text{Total number of items checked}$

When 4000 items are checked, we have the number of detective items to be evaluated as

$\begin{gathered} \text{Number of }\det ective\text{ items = }\frac{\text{0.026}}{100}\times\text{Total number of items checked} \\ y=\frac{0.026}{100}\times4000 \\ \Rightarrow y=1.04 \end{gathered}$

Hence, the number of detective items is 1.04.

7 0

1 year ago

2x minus y equals 6, x plus y equals negative 3

kap26 [50]

Answer:

y=-4, x=1

Step-by-step explanation:

2x-y=6 x+y=-3

2(-3-y)-y=6 x=-3-y

-6-2y-y=6 x=-3+4

-3y=12 x=1

y=-4

8 0

3 years ago

True or false: given a sample mean of 2.1 and a sample standard deviation of 0.7 from a sample of 10 data points, a 90% confiden

iris [78.8K]

Your answer is false.

4 0

3 years ago