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4 years ago

Find the sum of an arithmetic 9 terms; 2, 5, 8, 11.... 9

Mathematics

2 answers:

PIT_PIT [208]4 years ago

8 0

Answer:

Step-by-step explanation:

Sindrei [870]4 years ago

7 0

Answer:

126

Step-by-step explanation:

the formula for sum of arithmatic progression=n/2(2a+(n-1)d)

=9/2 (4+8*3)

=9/2*(28)

=9* 14=126

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(a)<br> Solve.<br> 3x – 4 = x + 5

exis [7]

Answer:

x = 1/2 or 0.5

Step-by-step explanation:

3x - 4 = x +5 (1) subtract x

2x - 4 = 5 (2) subtract 5

2x + 1 (3) divide by 2

x = 1/2 or 0.5

4 0

3 years ago

Drag each tile to the correct box. Not all tiles will be used. Consider function f. f(x)=7x-21 Place the steps for finding in th

dimulka [17.4K]

x=7x-21

Step-by-step explanation:

x=7x-21
21=7x-x
21=6x
x=21/6
x=7/2
x=3.5

5 0

2 years ago

The volume of the rectangular solid below is 1,440 cubic inches. What could be the length and width of this rectangular solid?

Rudik [331]

C. 8 inches by 20 inches

5 0

3 years ago

HELP I WILL MARK BRAINLIEST

gulaghasi [49]

Answer:

https://quizlet.com/141193969/mirrors-and-lenses-flash-cards/ i dont know

Step-by-step explanation:

7 0

3 years ago

Taille LHRISTINE

BartSMP [9]

Answer:

$-5 = x$

Step-by-step explanation:

$7(4x + 9) - 10 = -87 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: + \: 10 \: \: \: \: + 10 \\ \\ \frac{7(4x + 9)}{7} = -\frac{77}{7} \\ \\ 4x + 9 = -11 \\ \: \: \: \: \: \: -\: 9 \: \: \: \: \: - \: 9 \\ \\ \frac{4x}{4} = -\frac{20}{4} \\ \\ x = -5$

** The above answer is written in reverse, which is the exact same result.

I am joyous to assist you anytime.

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4 years ago