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dlinn [17]
3 years ago
7

The sum of five times a number and -6 is -2

Mathematics
2 answers:
k0ka [10]3 years ago
4 0
5n + (-6) = -2
add 6 to -2
5n = -2 + 6
5n = 4
divide both sides by 5
n = 4/5
spin [16.1K]3 years ago
3 0
Let' call the number 'M' for 'mystery number'.

The number . . . . .  M

Five times the number . . .  5 M

The sum of 5 times the number and  -6 . . .  5 M - 6

You said that's  -2 .  So I can write

                                         5 M - 6  =  -2

Add  6  to each side:      5 M       =   4

Divide each side by  5 :     M       =  4/5   or   0.8  .  
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the total cost of 4 pens and 7 mechanical pencils is $13.25 the cost of each pencil is $0.75 write an equation that could be use
balu736 [363]
4x+7y=$13.25
4x+ 7($0.75)
7 0
3 years ago
A food processor packages orange juice in small jars. The weights of the filled jars are approximately normally distributed with
Ratling [72]

Answer:

P(X>10.983)=P(\frac{X-\mu}{\sigma}>\frac{10.983-\mu}{\sigma})=P(Z>\frac{10.983-10.5}{0.3})=P(z>1.61)

And we can find this probability using the complement rule and with excel or the normal standard table:

P(z>1.61)=1-P(z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(10.5,0.3)  

Where \mu=10.5 and \sigma=0.3

We are interested on this probability

P(X>10.983)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>10.983)=P(\frac{X-\mu}{\sigma}>\frac{10.983-\mu}{\sigma})=P(Z>\frac{10.983-10.5}{0.3})=P(z>1.61)

And we can find this probability using the complement rule and with excel or the normal standard table:

P(z>1.61)=1-P(z

8 0
3 years ago
Anthony is now designing the classroom layout for the school. Each hallway has exactly 5 classrooms. If Anthony has 48 classes t
cluponka [151]

Answer:

9 and a half

Step-by-step explanation:

the fewest number is 9.5 because thats the exact amount in hallways that he needs

4 0
2 years ago
Read 2 more answers
Help me out please I don’t understand?
zepelin [54]

Answer:

ya i dont either

Step-by-step explanation:

6 0
3 years ago
4. Two cylinders have dimensions in the ratio of 2:3. The smaller cylinder has a surface area of 16 cm.
Zarrin [17]

Answer:

(cross multiply)

2:3

16:X

2X=16×3

2x=48

x=48÷2

x=24

8 0
3 years ago
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