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bezimeni [28]
3 years ago
6

The ratio of red marbles to blue marbles in a jar is 3 to 8. There are 40 blue marbles in the jar.

Mathematics
2 answers:
ddd [48]3 years ago
7 0

Answer:

15

Step-by-step explanation:

Pie3 years ago
3 0
_red_ = _3_              (set up problem) 
blue        8 

blue=40  R=red          (define terms) 

_ R_ = _3_                    (cross multiply) 
  40        8

8R=120            (divide by 8 on both sides)

R=15 

The answer is B.15 





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-10x—16=14<br> -16x -6 = 14
Alla [95]

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Step-by-step explanation:

-10x-16=14

-16x-6=14

-10x-16=-16x-6

-10x+16x-16=-16x+16x-6

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4 0
1 year ago
Write a polynomial function f of least degree that has a leading coefficient of 1 and the given zeros -4,-2,5. write the functio
OLga [1]

Answer:

Step-by-step explanation:

This is a third degree polynomial since we have 3 zeros.  We find these zeros by factoring the given polynomial.  The zeros of a polynomial are where the graph of the function goes through the x-axis (where y = 0).  If x = -4, the factor that gives us this value is (x + 4) = 0 and solving that for x, we get x = -4.  If x = -2, the factor that gives us that value is (x + 2) = 0 and solving that for x, we get x = -2.  Same for the 5.  The way we find the polynomial that gave us these zeros is to go backwards from the factors and FOIL them out.  That means that we need to find the product of

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x^2+6x+8

No we multiply in the final factor of (x - 5):

(x^2+6x+8)(x-5)=x^3+6x^2+8x-5x^2-30x-40 which simplifies to

f(x)=x^3+x^2-22x-40

If you are aware of the method for factoring higher degree polymomials, which is to use the Rational Root Theorem and synthetic division, you will see that this factors to x = -4, -2, 5.  If you know how to use your calculator, you will find the same zeros in your solving polynomials function in your apps.

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3 years ago
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