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3 years ago

What two numbers add to 4 and, when multiplied together, equal −12?

2 answers:

4 0

<span>Let x = first number
Let y = second number
x + y = 4
x * y = (-12)
Solve the first equation for x.
x = 4 - y
Now substitute this value of x into the second equation.
(4 - y) * y = (-12)
4y - y² = (-12)
y² - 4y - 12 = 0
(y + 2) * (y - 6) = 0
Now set both polynomials equal to zero
y + 2 = 0
y = -2
y - 6 = 0
y = 6
If you substituted these two values for y into either equation and solve for x, you would get the combination of 6 and -2

Hope I was able to help you! :)
</span>

Fed [463]3 years ago

3 0

6 and -2. When you add -2+6, you get 4. And when you multiple -2*6 you get -12
Hope this helps!

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A car rental company charges $31 per day to rent a particular type of car, and $0.19 per mile. Juan is charged $59.31 for a one-

snow_lady [41]

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

What is the value of x?

WINSTONCH [101]

Answer:

$\large\boxed{x=8\sqrt2}$

Step-by-step explanation:

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3 years ago

A train traveling 50 mph left a station 30 minutes before a second train running at 55 mph. how soon did the second train overta

Finger [1]

<span>1st train DATA:
rate = 50 mph ; time = x hrs ; distance = rt = 50x miles

2nd train DATA:
rate = 55 mph ; time = (x-(1/2)) hrs ; distance = rt = 55(x-(1/2)) miles

Equation:
distance = distance
50x = 55(x-(1/2)
50x = 55x - (55/2)
-5x = -55/2
x = 11/2
x = 5 1/2 hrs (time at which the 2nd train overtakes the 1st train)
Hope this helps!</span>

8 0

3 years ago

Read 2 more answers

How would you multiply. ? 3.5 2 ca D 52 3.5

hram777 [196]

Answer:

1274Dac

Step-by-step explanation:

i used photomath but i think thats right hope this helps:)

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2 years ago