$x^2+ 16x + 63=0 \\ \\a=1, \ b=16 , \ c=63 \\ \\ \Delta =b^2-4ac =16^2 -4\cdot1\cdot 63 = 256 -252 = 4 \\ \\x_{1}=\frac{-b-\Delta }{2a}=\frac{-16-\sqrt{4}}{2 }=\frac{-16-2}{2}=-\frac{-18}{2}=-9 \\ \\x_{2}=\frac{-b+\Delta }{2a}=\frac{-16+\sqrt{4}}{2 }=\frac{-16+2}{2}=-\frac{-14}{2}=-7 \\ \\ \\Answer : \ x= -7 \ \ or \ \ x= -9$

8 0

3 years ago

What is the place of the 9 in the number 5,948,003

tino4ka555 [31]

The 9 is in the one hundred thousand's place

4 0

3 years ago

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Tossing a regular coin 3 times, what is the probability of getting heads every time? 4)

larisa [96]

The probability of getting heads on the first toss is 1/2 .

Then, the probability of getting heads on the second toss is 1/2 .

Then, the probability of getting heads on the third toss is 1/2 .

The probability of all three things happening is ...

(1/2) x (1/2) x (1/2) = 1/8 = 0.125 = 12.5% .

6 0

3 years ago

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Solve each system of equations by substitution <br> X + 3y = 6<br> -x + y = -7

Naily [24]

Answer:

(27/4, -1/4)

Step-by-step explanation:

5 0

3 years ago