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mars1129 [50]
3 years ago
12

What algebraic expression is equivalent to this expression? 9(2x+6) - 18

Mathematics
2 answers:
pogonyaev3 years ago
8 0

Answer:

18x+36

Step-by-step explanation:

We are given the expression:

9(2x+6)-18

We want to simplify the expression. First, let's distribute the 9. Multiply each term inside the parentheses by 9.

(9*2x)+(9*6)-18

(18x)+(54)-18

Combine like terms. There are 2 constants (terms without variables): 54 and -18. We can add them together.

(18x)+(54+-18)

(18x)+(54-18)

18x+36

The expression 9(2x+6)-18 is equivalent to 18x+36

Svet_ta [14]3 years ago
3 0

Answer:

18x+36

Step-by-step explanation:

9(2x+6) - 18

Distribute

9*2x + 9 *6 -18

18x +54 -18

Combine like terms

18x+36

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Step-by-step explanation:

Let the original speed be 'x'

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According to question, it becomes,

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5 0
3 years ago
1)
Yuri [45]

Answer:

X = {8n – 7n – 1 : n ϵ N}

Y = {49 (n –1) : n ϵ N} — (1) [all terms divisible by 49]

X = {8n – 7n – 1}

= (1 + 7)n – 7n – 1

= 1 + nC1 7 + nC2 72 + ….. + nCn 7n – 7n – 1

= nC2 72 + …… + nCn 7n

= 49 [nC2 + nC3 7 + …. nCn 7n-2] — (2)

From (1) and (2),

X is divisible by 49.

Y has all multiples of 49.

X ⊂ Y

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