3 years ago

Please help!!! its due soon :)))

Mathematics

2 answers:

adoni [48]3 years ago

6 0

Answer:

The answer my friend is B.

Dmitriy789 [7]3 years ago

5 0

Answer:

Step-by-step explanation:

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What is a21 of the arithmetic sequence for which a7=−19 and a10=−28? A. -35 B. 35 C. -58 D. -61

shepuryov [24]

Answer:

a21 = -61

Step-by-step explanation:

$a_{n}=a_{1}+(n-1)d$

$-19=a_{1}+(7-1)d$

$-28=a_{1}+(10-1)d$ (subtract to eliminate a₁)

9 = -3d

d = -3

-19 = a₁ + (6)(-3)

-1 = a

a21 = -1 + (21 - 1)(-3)

= -61

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3 years ago

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Elenna [48]

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$\#2 \\\\ \frac{1}{8}x-12=\frac{3}{4} \\\\ \frac{1}{8}x=\frac{3}{4}+12^{(4} \\\\ \frac{x}{8}=\frac{3+48}{4} \\\\ \frac{x}{8}=\frac{51}{4} \\\\ x=\frac{\not8*51}{\not4} \\\\ x=2*51 \\\\ \boxed{x=102}$

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3 years ago

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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7B3%7D%20" id="TexFormula1" title=" \frac{x}{3} " alt=" \frac{x}{3} " align=

sergij07 [2.7K]

20+4 = 24

24x3 = 72

x=72

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3 years ago

What is (2*9)+(36*9)

mr Goodwill [35]

Answer:

it is 342