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Ilya [14]
3 years ago
13

Solve the equation: 3(x - 4) = -21 *

Mathematics
2 answers:
romanna [79]3 years ago
7 0

Answer:

x = -3

Step-by-step explanation:

simplify

3(x - 4) = -21

3x - 12 = -21

3x = = -9

x = -3

uranmaximum [27]3 years ago
3 0
3(x-4)=-21
-distribute-
3x-12=-21
-Move the -12 to the other side, separating the coefficient-
3x=-9
-Divide both sides by 3-

Answer: x=-3
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Anna11 [10]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Write the sum using summation notation, assuming the suggested pattern continues. -3+6+15+24+...+132
balandron [24]

Answer:

Option (4)

Step-by-step explanation:

Given sequence is,

-3 + 6 + 15 + 24 + ........+ 132

Difference in 1st and 2nd term = 6 - (-3)

                                                   = 9

Difference in 2nd and 3rd term = 15 - 6

                                                    = 9

There is a common difference of 9 in each successive term.

Therefore, it's an arithmetic sequence.

Let the nth term of this sequence is (a + bn).

For the first term → n = 0,

a = -3

For second term → n = 1

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b = 6 + 3

b = 9

Therefore, nth term of the sequence will be,

T_n = -3 + 9n

For nth term = 132

-3 + 9n = 132

9n = 135

n = \frac{135}{9}

n = 15

Sum of 15 terms can be represented by the expression;

\sum_{n=0}^{15}(-3+9n)

Option (4) is the answer.

7 0
2 years ago
Change the percent to a decimal. 370%
Elza [17]
To change a certain percentage to decimal, drop the percent sign and divide the remaining number by 100. From the given, dropping off the percent sign gives 370. Divide the number by 100. 

                           370 / 100 = 3.7

Thus, the decimal notation of 370% is 3.7. 



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Answer: 151 is the answer so a

Step-by-step

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