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vlada-n [284]
3 years ago
11

Last one in math! Help Me

Mathematics
2 answers:
skad [1K]3 years ago
4 0
The answer is C 4.29 kilometers.

First, multiply 0.55 × 5 = 2.75
( we multiply by 5 because there are 5 days in a week )
Then, we multiply 0.55 × 1.4 = 0.77
( we multiply by 1.4 because it said 1.4 times as the weekdays )
After that, we take 0.77 and multiply it by 2, like this 0.77 × 2 = 1.54
( we multiply by 2 because there are 2 days in the weekend )
Finally, we add 1.54 + 2.75 = 4.29

That's how you get your answer C 4.29 kilometers

Hope this helps!!
Andre45 [30]3 years ago
3 0
I CALCULATED IT AND GOT
C) 4.29
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A drawer contains 4 different pairs of gloves. Suppose we choose 3 gloves randomly, what is the probability that there is no mat
sergey [27]

Answer:

The probability that there is no matching pair is 4/7 = 0.5714286.

Step-by-step explanation:

For the first glove we have no restrictions. For the second glove, we have 6 gloves that works for us and 1 that doesnt work (the one that matches the first glove), hence we have 6 possibilities out of 7. Once we pick a good second glove, for the last glove, we only have 4 cases that doesnt match the other two pairs, out of 6 total. This means that the probability that there is no matching pair is 6/7*4/6 = 4/7.

4 0
3 years ago
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snow_tiger [21]

Step-by-step explanation:

Maryam scores in paper 1 65% × 120

= 65/100 × 120

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scores in paper 2 80% × 80

= 80/100 × 80

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4 0
3 years ago
I just need help with number 2 thanks !!
ICE Princess25 [194]
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4 0
3 years ago
John and Tim are looking at the equation the square root of the quantity of 3 times x minus 4 equals square root of x . John say
IgorC [24]
The equation is 
3x - 4 = sqrt(x)
where 'sqrt' is shorthand for 'square root'

Let's solve the equation. To do so, we square both sides. Then we get everything to one side
3x - 4 = sqrt(x)
(3x - 4)^2 = (sqrt(x))^2
9x^2 - 24x + 16 = x
9x^2 - 24x + 16-x = x-x
9x^2 - 25x + 16 = 0

Now use the quadratic formula. See the attached image for those steps.

After using the quadratic formula the two possible solutions are x = 1 or x = 16/9

We need to check each possible solution to see if it is extraneous or not.

----------------------------

Checking x = 1

3x - 4 = sqrt(x)
3*1 - 4 = sqrt(1)
3 - 4 = 1
-1 = 1

The final equation is false, so x = 1 is not a true solution

x = 1 is extraneous. 

So far, John is correct; however, we need to see the nature of the possible solution x = 16/9

So let's check it
----------------------------

Checking x = 16/9

3x - 4 = sqrt(x)
3*(16/9) - 4 = sqrt(16/9)
48/9 - 4 = 4/3
16/3 - 4 = 4/3
16/3 - 12/3 = 4/3
(16 - 12)/3 = 4/3
4/3 = 4/3

The last equation is true, so x = 16/9 is a proper solution.

This solution is considered non-extraneous. So Tim is also correct
----------------------------

They are both correct because there are two possible solutions. One of which is extraneous (x = 1) and the other is non-extraneous (the fraction x = 16/9)

3 0
4 years ago
Manuel noticed that his cellphone bill reflected a monthly fee of
Tomtit [17]

Answer: (total amount paid - $40) / 0.05

Step-by-step explanation:

Given the following :

Monthly fee = $40

Additional fee = $0.05 per minute on phone

Given the the amount paid for the month is available, number of minutes he was on phone can be determined thus :

Total amount to be paid = monthly fee + additional fee

Additional fee = $0.05 × n

Where n = number of minutes on phone

Hence,

Total amount paid = $40 + $0.05n

If the amount paid is known, the number of minutes on phone can be calculated thus;

(Total amount paid - monthly fee) = $0.05n

n = (Total amount paid - monthly fee) / fee per minute on phone

(total amount paid - $40) / 0.05

3 0
3 years ago
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