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kvv77 [185]
3 years ago
8

How do I reduce 3 25/21

Mathematics
1 answer:
Nesterboy [21]3 years ago
4 0
So 25 goes into 21 how many times? 1. Add that 1 to the 3 making 4.
Then how much is left over of the 25 & 21? 4.
Making it 4 4/21
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Plz gyz ineed the calculation
sergejj [24]

Answer:

Step-by-step explanation:

so he spends : 1/5 , 1/2 , 1/10.....common denominator of 10

1/5 + 1/2 + 1/10 = 2/10 + 5/10 + 1/10 = 8/10 = 4/5

so he spends 4/5 of his income.

that means he saves : 1 - 4/5 = 5/5 - 4/5 = 1/5 <==

8 0
3 years ago
Write the polynomial in factored form as a product of linear factors f(r)=r^3-9r^2+17r-9
adelina 88 [10]

Answer:

  f(r) = (x -1)(x -4+√7)(x -4-√7)

Step-by-step explanation:

The signs of the terms are + - + -. There are 3 changes in sign, so Descartes' rule of signs tells you there are 3 or 1 positive real roots.

The rational roots, if any, will be factors of 9, the constant term. The sum of coefficients is 1 -9 +17 -9 = 0, so you know that r=1 is one solution to f(r) = 0. That means (r -1) is a factor of the function.

Using polynomial long division, synthetic division (2nd attachment), or other means, you can find the remaining quadratic factor to be r^2 -8r +9. The roots of this can be found by various means, including completing the square:

  r^2 -8r +9 = (r^2 -8r +16) +9 -16 = (r -4)^2 -7

This is zero when ...

  (r -4)^2 = 7

  r -4 = ±√7

  r = 4±√7

Now, we know the zeros are {1, 4+√7, 4-√7), so we can write the linear factorization as ...

  f(r) = (r -1)(r -4 -√7)(r -4 +√7)

_____

<em>Comment on the graph</em>

I like to find the roots of higher-degree polynomials using a graphing calculator. The red curve is the cubic. Its only rational root is r=1. By dividing the function by the known factor, we have a quadratic. The graphing calculator shows its vertex, so we know immediately what the vertex form of the quadratic factor is. The linear factors are easily found from that, as we show above. (This is the "other means" we used to find the quadratic roots.)

7 0
3 years ago
What is the area of the figure?
Vanyuwa [196]

Answer: 42.5 m

Step-by-step explanation:

Split the figure into a rectangle and a triangle.

Find the areas of the rectangle and the triangle seperately and add them together.

Rectangle: 7 x 5 = 35

Triangle: 5 x 3/2 = 7.5

35+7.5= 42.5m

8 0
3 years ago
Read 2 more answers
What will an investment of 6000 Euro at 7% p.a compound interest amount to after 5 years if the interest is compounded:
Over [174]
S = P[1 + (r / m)]^(m * t) 

S = ? 

P = 6000 euro 

r = 0.07 

m = 12 

t = 5 

S = 6000[1 + (0.07 / 12)]^(12 * 5) 

S = 6000(1.00583)^(60) 

S = 6000(1.4176...) 

<span>S = 8505.75 euro

---------------------------

You can now do the rest which is anually and quarterly.</span>
5 0
3 years ago
Find ratio of 13cm : 65m​
vesna_86 [32]

Answer:

1:5

Step-by-step explanation:

13cm: 65cm = 13cm/65cm =13/65 = 1/5= 1:5

6 0
3 years ago
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