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Aliun [14]
2 years ago
9

China was isolated because of

Mathematics
1 answer:
rusak2 [61]2 years ago
5 0

Answer: D

Step-by-step explanation:

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Which quadratic equation has the roots -1+4i and -1-4i
AysviL [449]

Answer:

C

Step-by-step explanation:

Solve the quadratic in answer choice C using the quadratic formula:

x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}.

Here a=1, b=2, and c=17.

Substitute and you'll have:

x=\frac{-b+/-\sqrt{b^2-4ac} }{2a} =\frac{-2+/-\sqrt{(-2)^2-4(1)(17)} }{2(1)}=\frac{-2+/-\sqrt{4-68}}{2)}

\frac{-2+/-\sqrt{-64} }{2}=\frac{-2+/-8i }{2}=-1+/- 4i


6 0
3 years ago
• To round a number, look at the digit to the right of the
nadya68 [22]

Answer:

2. A) 37 B)160 C) 110

The tens digit is 10,20,30,40,50,60,70,80,90. Two away to the left of a decimal point.

3. A)730 B) 675 C)1930

The hundreds digit is three from the left of a decimal point.

4. A) 0.40 B)74.60 C)15.20

The tenth is one away to the right of the decimal.

5. A)1.210 B) 3.430 C)0.350

The hundreth is two away to the right of the decimal point.

Explanation:

If it is above 5 you bring the digit before it up by one, if it is under 5 you bring the digit that is under 5 to zero.

8 0
3 years ago
H(x)=4x+3<br> Domain: all real number<br> Find range
CaHeK987 [17]

don't know if this might help but here

Step-by-step explanation:

(−∞,∞),{y|y∈R}

4 0
2 years ago
CAN YOU PLEASE GIVE ME THE ANSWER ASP
SVEN [57.7K]

Answer:

N and P

Step-by-step explanation:

N and P grab a like and move the ends in a circle around each letter if they look symmetrical at any point that letter has a line of symmetry.

5 0
3 years ago
Read 2 more answers
Which expression is equivalent to 163?
hjlf

Answer:

C: 2^12 is the answer

Step-by-step explanation:

the expression is 16^3=4069 and 2^12=4069 so 2^12 is equivalent to 16^3

4 0
2 years ago
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