Mathematics: Hich expression is equivalent to −30+(−40)+(−70) ? a.30+40+70? b.−30−(40−70) c. −(30−40)+(−70) d.−30+(−70)+(−40)

Hich expression is equivalent to −30+(−40)+(−70)

aharvitt0417

05.01.2022

-30+(-40)+(-70) = -140

A) 140
B) 0
C) -60
D) -140

So your answer would be D

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alethhaaa

05.01.2022

D.-30+(-70)+(-40)

Step-by-step explanation:

Given expression,

-30+(-40)+(-70)

= -30-40-70

= - 140

In option A,

30+40+70 = 140 ≠ -140,

In option B,

-30-(40-70) = -30 - (-30) = -30 + 30 = 0 ≠ -140,

In option C,

-(30-40)+(-70) = -(-10) - 70 =10 - 70 = -60 ≠ -140,

In option D,

-30+(-70)+(-40) = -30-70-40 = -140

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mayaduke9482

10.03.2021

$a_1=1\\d=2\\a_n=1+(n-1)\cdot 2=1+2n-2=2n-1$

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