3 years ago

F(x) = {4x² – 1, x = -2 x > -2 la -x, what is f(0)

Mathematics

1 answer:

beks73 [17]3 years ago

5 0

Yes that answer is accurate

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Carmen worked more than 40 hours last week and earned $352.95. Her regular hourly pay rate is $7.80. After 40 hours, she is paid

posledela

She worked 50.5 hours last week.

7.80x40=312

352.95-312=40.95

40.95/4.90=10.5

10.5+40=50.5

4 0

3 years ago

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Simplify -4(x+6)+2(x-2)

kati45 [8]

Answer:

$-2x-28$

Step-by-step explanation:

We can apply the distributive property then combine like terms for a simpler equation.

$-4(x+6)+2(x-2)\\\\-4x-24+2x-4\\\\-2x-28$

Hope this helped!

6 0

3 years ago

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the second term of a geometric sequence is 18 and the fourth term is 8 find the common ratio . And find the sum of the first 6 t

777dan777 [17]

Answer:

ratio: 2/3
sum: 73 8/9

Step-by-step explanation:

The general term of a geometric sequence is ...

an = a1·r^(n-1)

You have the 2nd and 4th terms, so ...

a2 = a1·r^(2-1) = a1·r

a4 = a1·r^(4-1) = a1·r^3

We can find r from the ratio ...

a4/a2 = (a1·r^3)/(a1·r) = r^2 = 8/18 = 4/9

Then r is ...

r = √(4/9) = 2/3 . . . . the common ratio

The first term is ...

a2 = 18 = a1·(2/3)

a1 = (3/2)·18 = 27

The sum of the first 6 terms is ...

Sn = a1·(r^n -1)/(r -1)

S6 = 27·((2/3)^6 -1)/(2/3 -1)

S6 = 27·(64/729-1)/(2/3-1) = (27)(665)/243 = 73 8/9

The sum of the first 6 terms is 73 8/9.

_____

<em>Check on the sum</em>

The first 6 terms are ...

27, 18, 12, 8, 5 1/3, 3 5/9

Their sum is 73 8/9, as above.

8 0

3 years ago

What is the value of x that makes the given equation true?<br> X-3x=2(4+x)

Ratling [72]

x - 3x = 2(4 + x)

-2x = 8 + 2x

-4x = 8

x = -2

7 0

3 years ago

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Evaluate the equation.

nordsb [41]

The answer is B) m=3 2/3

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3 years ago

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