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stiv31 [10]
3 years ago
7

Using distributive property what expression is equal to 7(3x-2)

Mathematics
2 answers:
Black_prince [1.1K]3 years ago
7 0

Answer:

21 x - 14

Step-by-step explanation:

7 ( 3 x -2 )

Using distributive property,

multiply both by 7

7 × 3 x - 7 × 2

21 x - 14

\:

grin007 [14]3 years ago
4 0
21x - 14
Explanation:
you distribute the 7, and first multiply it by 3x to get 21x. Then you distribute the 7 and multiply it by the -2 to get -14.

Hope this helps!
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1. Some roads in Poland have a speed limit of 140 km/h. How fast is this in miles per minute?
Y_Kistochka [10]
I only know number one here you goSolution
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8 0
3 years ago
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1.2, 3, 7.5, 18.75, ...<br><br> Which formula can be used to describe the sequence?
Nady [450]

Answer:

The formula is:

a_n=1.2(\frac{5}{2})^{n-1}

Step-by-step explanation:

The geometric sequences are those in which the division between the terms a_{n + 1} and a_n of the sequence are equal to a constant common reason called "r"

The geometrics secencias have the following form:

a_n=a_1(r)^{n-1}

Where a_1 is the first term of the sequence

In this sequence we have the following terms

1.2, 3, 7.5, 18.75

Then notice that:

\frac{3}{1.2}=\frac{5}{2}\\\\\frac{7.5}{3}=\frac{5}{2}\\\\\frac{18.75}{7.5}=\frac{5}{2}

Then:

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Finally the formula is:

a_n=1.2(\frac{5}{2})^{n-1}

5 0
3 years ago
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−5x+2y=9<br> y=7x<br> ​x=<br> y=
Serhud [2]

- 5x+2y=9 \\ y=7x

We know that y=7x, so we just need tu put it into the 1st equation

- 5x + 2 \times 7x = 9 \\  - 5x + 14x = 9 \\ 9x = 9 | \div 9 \\ 9x \div 9 = 9 \div 9 \\ x = 1

So we found x. Now we can find y

y = 7 \times 1 \\ y = 7

Answer:

x=1, y=7; or (1;7)

4 0
3 years ago
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