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rjkz [21]
4 years ago
8

Need help on answering number 12.

Mathematics
1 answer:
Greeley [361]4 years ago
5 0
A) 9.06 is the square root of 82
b) a. he evaluated 82/2 instead of evaluating the square root of 82
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Combine Like Terms : 12x^4-2x+6x^4-10x
zmey [24]
Should be 18x^4-12x.
Let me know if you want more of an explanation.
3 0
3 years ago
a country's population in 1990 was 134 million. in 2000 it was a 139 million. estimate the population in 2014 using the exponent
yuradex [85]
F=ir^t

139=134r^10

139/134=r^10

r=(139/134)^(1/10) then:

f=134(139/134)^(t/10)  so in 2014, t=24 so

f=134(139/134)^(2.4)

f≈146 million  (to nearest million)

Some will say that you have to use the exponential function, but it really gives you the same answer...even for continuous compounding :)...

A=Pe^(kt)

139=134e^(10k)

139/134=e^(10k)

ln(139/134)=10k

k=ln(139/134)/10 so

A=134e^(t*ln(139/134)/10)  when t=24

A=134e^(2.4*ln(139/134))

A≈146 million (to nearest million)

The only real reason or advantage to using A=Pe^(kt) is when you start getting into differential equations...
6 0
3 years ago
Help me with 32 please!!!!!!
Alexeev081 [22]
-8x - 46 = -6x - 8
-8x + 6x = -8 + 46
-2x = 38
x = -19

The equation:
-8x - 46 = -6x - 8

The solution:
x = -19
8 0
3 years ago
One hundred is multiplied by a number between 0 and 1. Which of the following could be an answer?
kvasek [131]

Answer:

72

Step-by-step explanation:

0 < x < 1

Multiply the inequality by 100

0 < 100x < 100

0 < 72 < 100

8 0
3 years ago
Read 2 more answers
Choose the equation that represents a line that passes through points (−1, 2) and (3, 1).
3241004551 [841]

You did not provide us with equations to select.

Find the slope m.

m = (1 - 2)/(3 - (-1))

m = -1/(3 + 1)

m = -1/4

Use the slope and one of the points and plug into the point-slope formula.

y - 1 = (-1/4)(x - 3)

Isolate y.

y - 1 = (-1/4)x + (3/4)

y = (-1/4)x + (3/4) + 1

y = (-1/4)x + (7/4)

Did you follow?

5 0
3 years ago
Read 2 more answers
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