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Anika [276]
4 years ago
15

5.Solve the quadratic equation.

Mathematics
1 answer:
Dafna1 [17]4 years ago
5 0

Answer:

x=5 twice

Step-by-step explanation:

x^2-10x+25=0

multiply the coefficient of x^2 and the last term

1X25=25

find two numbers you can multiply to get 25 and add to get -10

-5 + (-5)=-10 the middle term

replace -10x with -5x -5x and solve the equation

x^2-5x-5x+25=0

factorise by grouping

x(x-5)-5(x-5)=0

(x-5)(x-5)=0

Either x-5=0,x=5 or x-5=0,x=5

Therefore x=5 twice.

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Write an exponential function for the value, y, after x years
Anon25 [30]

Step-by-step explanation:

<u>Step 1:  Set x equal to 0 to find the y-int</u>

y = 10000(1 - 0.40) → Not an exponential equation

y=10000(1-0.40)^0 → 10,000 → Works for first test

y = 10000(1-0.60)^0 → 10,000 → Works for first test

y = 10000(1+0.40)^0 → 10,000 → Works for first test

<u>Step 2:  Set x equal to 1</u>

y=10000(1-0.40)^1 → 6,000 → Works for second test

y = 10000(1-0.60)^1 → 4,000 → Does not work for the second test

y = 10000(1+0.40)^1 → 14,000 → Does not work for the second test

Answer:  The answer is Option B

4 0
4 years ago
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Sergeeva-Olga [200]

Answer:

angle 3 + angle 5 = 180°( co-interior angles)

120°+6x=180°

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x=10°

therefore, angle 5= 6x=6×10°=60°

5 0
3 years ago
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Which of the following describes the positive solution to the equation below? The solution is greater than one but less than two
marysya [2.9K]
The solution is greater than one but less than two
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Your answer is 2 deviations
8 0
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Help me with this please!!
Leni [432]

Answer:

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Step-by-step explanation:

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