What two numbers add to 9 but multiply to -42

Answers

Answer 1

Answer: The factors of 42 are 1,42,2,21,3,14,6,7. Non of these add together to get 9. One would have to be positive and the other negative but it still doesn't work.

Answer 2

Answer: Hi,

x+y = 9 ⇒ x = 9-y
x·y = -42

(9-y)·y = -42
9y-y² = -42
y²-9y-42 = 0 for a = 1, b = -9 e c = -42

Δ = b²-4ac
Δ = (-9)²-4(1)(-42)
Δ = 81+168
Δ = 249

y₁ = (-b+√Δ)/2a = (-(-9)+√249)/2(1) = (9+√249)/2 = 9/2 + √249/2
y₂ = (-b-√Δ)/2a = (-(-9)-√249)/2(1) = (9-√249)/2 = 9/2 - √249/2

For y = 9/2 + √249/2

x+y = 9
x = 9-y
x = 9-(9/2 + √249/2)
x = 9/2 - √249/2

For y = 9/2 - √249/2

x+y = 9
x = 9-y
x = 9-(9/2 - √249/2)
x = 9/2 + √249/2

Answer:

Numbers: 9/2 + √249/2 and 9/2 - √249/2

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The coin falls down with an average speed of 132.3 meters per second from 3 seconds to 6 seconds.

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The coin travels an average distance of 132.3 meters from 3 seconds to 6 seconds.

The coin travels an average distance of 44.1 meters from 3 seconds to 6 seconds.

Answers

change in distance = 176.4 - 44.1 = 132.3
change in time = 6 - 3 = 3

The object travels 132.3 meters in 3 seconds

the speed is the ratio of the two values

speed = distance/time
speed = 132.3/3
speed = 44.1 meters per second

This is the average speed of the object from t = 3 to t = 6 seconds. This is equivalent to the slope of the straight line through the two points.

The answer is The coin falls down with an average speed of 44.1 meters per second from 3 seconds to 6 seconds.`

1 Simplify Expression 1.
(D+5)+(d+5)+(d+5)

Answers

Answer:

Final Answer: 3d+15

Step-by-step explanation:

d+5+d+5+d+5

5+5+5= 15

d+ d+ d= 3d

Which linear function represents the line given by the point-slope equation y + 7 = –(x + 6)?f(x) = –x – 11
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f(x) = –x + 3
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Answers

none of these answers would be correct
subtract 7 from both sides and it becomes -7
y=-(x+6)-7
simplify by y=-x-6-7
y = -x-13
the f(x)=-x+13 could be correct if it was written as f(x) = -(x+13)

Answer:

It should be A since the problem has a -2/3 in the equation so that makes it y+7=-2/3(x+6) and the answer should be f(x)=-2/3x-11.

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Answers

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Answers

I think you posted this on accident

You want to put $2,500 in a simple interest account. It has a 4% annual interest rate. How long will it take you to earn $200 in interest?

Answers

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