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3 years ago

(5x+2x^2-3)-(6+x^2-8x)

Mathematics

2 answers:

Usimov [2.4K]3 years ago

4 0

Answer:

=x^2+13x-9

Step-by-step explanation:

Nimfa-mama [501]3 years ago

3 0

Answer:

13x + x^2 - 9

Step-by-step explanation:

You have to distribute then eliminate redundant parentheses then subtract the numbers then combine like terms then multiply by one then combine like terms and then the answer is 1 13x + x^2 - 9.

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Assume the cost of a car is $25,000. With continuous compounding, in effect, the cost of the care will increase according to the

Masja [62]

The value of t that makes the factor e^(.032t) have the value of 2 can be found using logarithms.
2 = e^(0.032t)
ln(2) = ln(e^(0.032t)) = 0.032t
t = ln(2)/0.032 ≈ 21.66

It would take 21.66 years for the cost to double.

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3 years ago

1. What values of a, b, and c would you use in the quadratic formula for the following equation?

kiruha [24]

Answer: See each part below.

1) A, B, and C are the coefficients in order when it equals 0. Move over the 4 and you have 5, 9, -4 or Choice B.

3) If you graph the equation, it will be above the x-axis. Therefore, it has no roots. Choice D

4) Choice A is correct. Use the coefficients: A = 4, B = 3, C = -10. Simply plug those into the quadratic equation and you will get -2 and 1.25.

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3 years ago

Outside Gretchen's house at noon, the temperature was -5° F. The temperature fell 2° F per hour for the next 6 hours.

shutvik [7]

At 6pm, the temperature is -17 degrees Fahrenheit.

3 0

3 years ago

Check all of the functions that are odd.

Elan Coil [88]

For a function to be odd f(-x)=-f(x).

1) putting x as -x

f(-x)= -x^3+x^2 = -f(x)

Thus, this is an odd function.

2) Following the same procedure,

f(-x)= -x^5+3x^3-2x =-f(x)

Thus, this is an odd function.

3) Again,

f(-x)= -4x-9 = -f(x)

This also is an odd function.

Hope this helps :)

8 0

3 years ago

Read 2 more answers

Sum of $1000 was invested for 4 years, and the interest was compounded semiannually. If this sum amounted to $1389.08 in the giv

eduard

The answer is 8%

Compound interest formula is:
A = P(1 + r/n)ⁿˣ
A - the final amount
P - the initial amount
r - interest rate
n - number of compoundings per year
x - time period

We have:
A = <span>$1389.08
P = </span><span>$1000
r = ?
n = 2 (it is semiannual)
x = 4

</span>A = P(1 + r/n)ⁿˣ
1389.08 = 1000(1 + r/2)²*⁴
1389.08 = 1000(1 + r/2)⁸
(1 + r/2)⁸ = 1389.08/1000
(1 + r/2)⁸ = 1.389
$\sqrt[8]{(1 + \frac{r}{2} ) ^{8}} = \sqrt[8]{1.389} \\ 
1 + \frac{r}{2} =1.04 \\ 
 \frac{r}{2} = 1.04-1 \\ 
 \frac{r}{2} = 0.04 \\ 
r = 2*0.04 =0.08$
r = 0.08 = 8/100 = 8%

7 0

3 years ago