How do you find the product of -2(3.1)

Mathematics

1 answer:

Alexxandr [17]3 years ago

5 0

Answer:

- 6.2

Step-by-step explanation:

The product of - 2 (3.1) is - 6.2.

Brackets mean to multiply so we have to multiply the - 2 by 3.1 which gives a result of - 6.2.

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A rectangle measures 1200 cm by 2 m. Find the perimeter of the rectangle.

olga nikolaevna [1]

Answer:

Perimeter = 28 mt or 2800 cms

Step-by-step explanation:

Formula for Perimeter is

P = 2(l+b)

Here P = we have to find

Length = l = 1200 cm Given

Width = b = 2 m = 200 cm (Given and converted into cm as the units must be same)

Putting those values in the formula

P=2(1200+200)

P=2(1400)

P=2800 cm

P=28 mt

4 0

3 years ago

How can I solve and start ?

dsp73

Ok so u have to set them equal to 180 bc they r supp lines so 1.15+x=180 sub 15 from both sides x=165
2.28+x-4=180 combine like terms 28-4=24 rewrite 24+x=180 den sub 24 from both sides x=156
I will put the rest in the comments if you still don't know

6 0

3 years ago

It has been observed that electrical connectors manufactured by Jolt Electrical Supply Company last an average of 18.2 months an

Juli2301 [7.4K]

Answer:

340

Step-by-step explanation:

The first step is finding the percentage of those who fail within 19 months.

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 18.2, \sigma = 1.7$