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N76 [4]
3 years ago
5

-21+7u=28 solve for u

Mathematics
2 answers:
ch4aika [34]3 years ago
5 0

Answer:

u = 7

Step-by-step explanation:

-21 + 7u = 28

add 28 to both sides

7u = 49

divide by 7

u = 7

horrorfan [7]3 years ago
5 0

Answer:U=7

Step-by-step explanation:

You might be interested in
PERÍMETRO: Encuentra las dimensiones de un rectángulo con perímetro igual a 563 pulgadas, si su largo es 6 pulgadas menos que 4
Orlov [11]

Answer: 4x - 6 = 563

Suma 6 a ambos lados para aislar la variante 4x.

4x - 6 = 563

+6. +6

4x = 569

Divide ambos lados por 4

4x/4 = 569/4

X = 142.5

Step-by-step explanation:

4 0
3 years ago
The length of a shadow of a building is 30 m. The distance from the top of the building to the tip of the shadows is 36 m. Find
kupik [55]

Answer:

46.86

Step-by-step explanation:

a^2+b^2=c^2

30^2+36^2=c^2

2196=c^2

Square root both sides

46.86=c

7 0
3 years ago
If the total cost plus shipping is greater than $35,then you receive a 10% discount off the original selling price. Do you quali
RUDIKE [14]

<u>It's not clear what is the specific requirement of the question, but I'll assume a couple of situations to help you with your real problem.</u>

Answer:

$45 (qualified)

$30 (did not qualify)

Step-by-step explanation:

<u>Percentage Calculations</u>

Relative quantities are usually expressed as percentages (%). We say x percent of y is the proportion xy/100. When discounts or surcharges are applied, they are subtracted or added to the original quantity.

The question explains I receive a 10% discount off the original selling price if the total cost plus shipping is greater than $35. Let's assume the total cost plus shipping is $50. Since it's greater than $35, it qualifies for a discount. The discount is 10% of $50 = (10)(50)/100= $5. So the new total cost will be $50 - $5 = $45

Let's suppose now the total cost+shipping is $30. Since it's not greater than $35, no discount will be applied and we have to pay $30

7 0
3 years ago
This is an answer not a question btw if u have this same question<br> 4 2/3 divided by 1/2 = 9 1/3
Reika [66]
Thanks for the answer
7 0
3 years ago
I need help ASAP!!
Viktor [21]

Answer:


\frac{64}{49}


Step-by-step explanation:


As we can see the given expression as three complex parts and all are being multiplied.


Lets simplify each part separately and then multiply all of them in the end


Part1


(\frac{8.4.2}{8.7})^{2}  

Cancelling 8 in numerator with 8 in denominator


(\frac{4.2}{7})^{2}


(\frac{8}{7})^{2}


\frac{64}{49}


Part2


(\frac{8^{0} }{7^{-3} })^{3}


simpliying


(\frac{1}{7^{-3} })^{3}


({7^{3} })^{3}


7^{9}


Part3


Third part is 7^{-9}, and it does not need to be further simplified


Now multiplying all the three parts


\frac{64}{49}.7^{9}.7^{-9}


\frac{64}{49}.7^{9-9}


\frac{64}{49}.7^{0}


\frac{64}{49}.1


\frac{64}{49}


So our final answer is \frac{64}{49}



5 0
3 years ago
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