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3 years ago

Simplify the following expression: –10x – 9x + 1

Mathematics

2 answers:

Katen [24]3 years ago

7 0

Answer: -19x +1

Step-by-step explanation: Do -10x -9x which is -19x and you have 1 which is unlike terms .So your final answer is -19x +1 .

Komok [63]3 years ago

5 0

-19x+1 is the simplified version. You collect like terms to get (-10-9)x+1 and then calculate the difference for the answer.

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Vanyuwa [196]

Option B:

$-4.9t^2+20t+1.2=0$

General formula for the height(feet) of a projectile over time:

$h(t)=-16t^2+v_0t+h_0$

where h represents height (feet)

t represents time

$v_0$ represents initial velocity

$h_0$ represents initial height(feet)

General formula for the height(metres) of a projectile over time:

$h(t)=-4.9t^2+v_0t+h_0$

where h represents height (feet)

t represents time

$v_0$ represents initial velocity

$h_0$ represents initial height(metres)

Given data in the question:

$h_0=1.2$ metre

$v_0=20$ m/s

To determine the equation to find time:

Substitute $h_0$ and $v_0$ in general formula for the height(metres) of a projectile over time:

$h(t)=-4.9t^2+20t+1.2$

$\Rightarrow -4.9t^2+20t+1.2=0$

Therefore option B is the correct answer.

$-4.9t^2+20t+1.2=0$

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