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valentinak56 [21]
3 years ago
11

Which expression represents: the product of 7 and the sum of 3 times a number n and 5?

Mathematics
1 answer:
Dmitrij [34]3 years ago
4 0

Answer:

7(3n+5)

Step-by-step explanation:

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Alec is trying to find the surface area of a shoe box. What unit will he use? A) cubic feet B) square feet C) cubic inches D) sq
zysi [14]
The answer to this question would be: <span>D) square inches</span>

In this question, Alex needs to find the surface area of a shoe box. Surface area unit would be represented by "square" because it is 2 dimension. The unit "cubic" is used for volume which was 3 dimension. From here, the option A and C is out because it uses cubic.
The inch unit is better since it was smaller than feet. If you using feet square, the area of the shoe box will be small and it might be less accurate than using inch.
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A vending machine operator has determined that the number of candy bars sold per week by a certain machine is a random variable
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6 0
3 years ago
5/6÷3/10 how do I solve step by step
romanna [79]

To divide a number by a fraction, multiply this number by the reciprocal of the fraction.

\dfrac{5}{6}\div\dfrac{3}{10}=\dfrac{5}{6}\cdot\dfrac{10}{3}=\dfrac{50}{18}=\dfrac{50:2}{18:2}=\dfrac{25}{9}=2\dfrac{7}{9}

8 0
3 years ago
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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
zysi [14]

5x^3=405x\ \ \ \ |-405x\\\\5x^3-405x=0\\\\5x(x^2-81)=0\iff 5x=0\ \vee\ x^2-81=0\\\\5x=0\ \ \ \ |:5\\\boxed{x=0}\\\\x^2-81=0\ \ \ |+81\\x^2=81\to x=\pm\sqrt{81}\to \boxed{x=\pm9}\\\\Answer:\ x=-9\ or\ x=0\ or\ x=9

5 0
4 years ago
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