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professor190 [17]
3 years ago
6

What is a 40% decrease of 85?

Mathematics
1 answer:
Andrews [41]3 years ago
6 0
40% of 85 is 34 so 85-34=51

51 is your answer

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Fast i need it thanks
Troyanec [42]

Answer:

trigonometry is difficult haha….  Answer is 8.81 I think

Step-by-step explanation:

5 0
1 year ago
The roots of the equation are 3 + 8i and 3 – 8i.
g100num [7]
Given that the roots of the equation x^2-6x+c=0 are 3+8i and 3-8i, the value of c can be obtained as follows;
taking x=3+8i and substituting it in our equation we get:
(3+8i)^2-6(3+8i)+c=0
-55+48i-18-48i+c=0
collecting the like terms we get:
-55-18+48i-48i+c=0
-73+c=0
c=73
the answer is c=73
3 0
3 years ago
Which formula gives the x-coordinates of the maximum values for y = cos(x)?
solong [7]

We have been given a function y=\cos(x). We are asked to find the formula which gives the x-coordinates of the maximum values for given function.

We know that cosine function oscillates between -1 and 1 that is minimum value of cosine is -1 and maximum value is 1.

We also know that \cos(0)=1 and after period of cosine is 2\pi. This means after every 2\pi, we will get to 1.

So maximum of cosine is 2\pi n, where n is an integer.

Therefore, our required formula is 2\pi n, where, n=0,\pm 1,\pm 2,\pm3,...

7 0
3 years ago
The perimeter of a triangle is 6x. One side is x+3 and another side is 2x+4. What is the length of the 3rd side?
maxonik [38]
Let y = the length of the 3rd side
x+3 + 2x+4 + y = 6x
x + 2x + 3 + 4 + y = 6x
3x + 7 +y = 6x
7 + y = 3x
y = 3x - 7
The length of the third side in terms of x is 3x-7
6 0
3 years ago
Compound interest
aev [14]

9514 1404 393

Answer:

  4254.31

Step-by-step explanation:

The compound interest multiplier is ...

  m = (1 +r/n)^(nt) . . . . annual rate r compounded n times per year, t years

For 11% compounded quarterly for 18 years, the multiplier is ...

  m = (1 +0.11/4)^(4·18) = 1.0275^72 ≈ 7.0516671

If 30,000 is the future value, then the present value is ...

  PV = FV/m = 30,000/7.0516671

  PV ≈ 4254.31

3 0
2 years ago
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