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Charra [1.4K]
3 years ago
12

WILL MARK BRANLIEST AND THANK! 10 POINTS, EASY QUESTION!!

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
4 0

Answer: 2±√3 and 1/(2±√3)

This might seem wrong, but you'll understand when you read the explanation.

Step-by-step explanation:

For this problem, you can write 2 equations to find the two numbers. Let's establish x for the first number and y for the second number.

Equation 1:

x+y=4

This equation comes from the problem that says the 2 numbers add up to 4.

Equation 2:

x*y=1

This equation comes from the part that says multiplies to 1.

Even if the problem states that the numbers can be negative, it is tricking us. We know in order for the product of 2 numbers to be positive, it has to be +*+ or -*-. Since the added numbers have to be +4, we know we cannot use -1 and 1 as our answer. What we can do is to use substitution to solve for x and y.

x+y=4 becomes y=4-x

We can substitute this into equation 2.

x(4-x)=1

4x-x²=1

4x-x²-1=0

-x²+4x-1=0

Since this equation is not factorable, we use the quadratic equation, \frac{-b±\sqrt{b^2-4ac} }{2a} (<em>Please ignore the weird looking A that's in front of the ± sign. I don't know what's wrong with the system, but it's not supposed to be there)</em>

We plug our a, b, c into the equation and get x=2±√3.

Now that we know our x, we can plug it into any of the above equations.

(2±√3)(y)=1

y=1/(2±√3)

Our final 2 numbers are 2±√3 and 1/(2±√3)

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The label on the car's antifreeze container claims to protect the car between −40°C and 125°C. To covert Celsius temperature to
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Answer:

see below

Step-by-step explanation:

The label on the car's antifreeze container claims to protect the car between -40°C and 125°C.

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7 0
2 years ago
Help with this math question please
Cloud [144]
A = P( 1 + rt)
A/P = 1 + rt
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t = (( A/P)) - 1)/r


t = (( 5500/1000) - 1)/(6.25/100
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4 0
3 years ago
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The length of a side of a square field is 48m.Find the cost of ploughing the field at the rate of rs 25/m and cost of fencing th
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Answer: rs 4800, rs 3456

Step-by-step explanation:j

given data:

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8 0
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