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vivado [14]
3 years ago
8

See file attached below:

Mathematics
1 answer:
pochemuha3 years ago
7 0

Answer:

Goodluck my dude.

Step-by-step explanation:

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A car travels 568km in 8 1/2 hours. What is the average speed in meters/second?
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The speed would be 60kph

60/60=1

Step-by-step explanation:

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It would at a speed of 1,440km per day.

In a year it would go 525,600 km.

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5 0
3 years ago
PLEASE HELP ME NOW URGENT
timama [110]

ANSWER

y   = 3 \pm \sqrt{21}

EXPLANATION

The quadratic equation is:

{y}^{2}  - 6y - 12 = 0

Group variable terms:

{y}^{2}  - 6y = 12

Add the square of half, the coefficient of y to both sides.

{y}^{2}  - 6y  + ( - 3) ^{2} = 12 + ( - 3) ^{2}

{y}^{2}  - 6y  + 9= 12 + 9

The LHS us now a perfect square trinomial:

{(y - 3)}^{2}= 21

Take square root:

y - 3 =  \pm \sqrt{21}

y = 3 \pm \sqrt{21}

The first choice is correct.

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