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Shtirlitz [24]
2 years ago
13

Solve for r. -1r + 1 > 7

Mathematics
1 answer:
Alexeev081 [22]2 years ago
7 0

Answer:

r < − 6

Step-by-step explanation:

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A carton measures 3 feet by 2 feet by 2 feet. A machine can fill the carton with packing material in 3 seconds. How long would i
True [87]
1) we calculate the volume of the first carton:
volume=length x width x height
volume=3 ft * 2 ft * 2 ft=12 ft³

Therefore: 
A machine can fill 12 ft³ in 3 seconds.

2) we calculate the volume of the second carton. 
volume=length x width x heigth
volume=4 ft * 5 ft * 6 ft=120 ft³

3) we calculate the time that the machine needs for fill the second carton with packing material by the rule of three.

12 ft³---------------------3 seconds
120 ft³--------------------      x

x=(120 ft³ * 3 seconds) / 12 ft³=30 seconds.

answer: 30 seconds. 


5 0
3 years ago
An electrical rm manufactures light bulbs that have a life span that is approximately normally distributed. The population stand
stira [4]

Answer:

The 't' test statistic = 1.46 < 1.69

The test of hypothesis is H 0 :μ = 800 is accepted

A sample of 30 bulbs are found came from average µ= 800

Step-by-step explanation:

Step 1:-

Given population of mean μ = 800

given size of small sample n =30

sample standard deviation 'S' = 45

Mean value of the sample χ = 788

Null hypothesis H_{0} =µ  =800

alternative hypothesis  H_{1} = µ ≠ 800

<u>Step 2</u>:-

The 't' test statistic t =  \frac{x-μ}{\frac{sig}{\sqrt{n} } }

                             t = \frac{788-800}{\frac{45}{\sqrt{30} } }

                       t = \frac{12}{8.215} = 1.4607

<u>Step 3</u>:-

The degrees of freedom γ = n-1 = 30-1 =29

From "t" value from table at 0.05 level of significance ( t = 1.69)

The calculated value t = 1.4607 < 1.69

Therefore The null hypothesis H_{0} ' is accepted.

<u>conclusion</u>:-

A sample of 30 bulbs are came found from average µ= 800

7 0
3 years ago
What is y(x)+ab-5 I don’t get the problem
diamong [38]

Answer:

ab+xy−5

Step-by-step explanation:

yx+ab−5  = xy+ab+−5

Simplify-

ab+xy−5

6 0
2 years ago
Can some one plz help me
WARRIOR [948]
#2 because it’s a Pythagorean theorem triple
Sorry I only know that one
4 0
3 years ago
Read 2 more answers
Not sure what this is but last choice is 60 miles FIRST ANSWER GETS BRAINLIEST HEHEHE
disa [49]

Answer: b

Step-by-step explanation:

5 0
2 years ago
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