Mathematics: (x2 − 3x + 8) − (7x2 − 2x − 1)

(x2 − 3x + 8) − (7x2 − 2x − 1) - id23872217088875, cocoapop

rishawn12345

30.01.2022

- 6x² - x + 9

Step-by-step explanation:

Given

(x² - 3x + 8) - (7x² - 2x - 1)

Distribute the first parenthesis by 1 and the second by - 1

= x² - 3x + 8 - 7x² + 2x + 1 ← collect like terms

= - 6x² - x + 9

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meganjackson155

10.09.2020

The mass of the object will be "25 kg".

Step-by-step explanation:

Given that,

Mass,

m = 15 kg

Acceleration,

a = 5 m/s²

Now,

The force will be:

⇒ F = ma

$=15\times 5$

$=75 \ N$

When, acceleration (a) = 3 m/s²

⇒ F = ma

or,

⇒ $m=\frac{F}{a}$

$=\frac{75}{3}$

$=25 \ kg$

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