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nirvana33 [79]
3 years ago
12

PLEASE HELP ME! Find 15/4+(−4/13). Write your answer as a fraction in simplest form.

Mathematics
2 answers:
NikAS [45]3 years ago
8 0
179/52 or 3 23/52


you should get the app photo math, it helps a lot
MArishka [77]3 years ago
4 0

Answer:

3 and 23

        __

         52

Step-by-step explanation:

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Please help me with this question
iris [78.8K]
A= \pi r^2  \ \ \ and \ \ \ C=2 \pi r \ \ \ \ \to \\  \\  \cfrac{\pi r^2 }{2 \pi r}= \cfrac{22}{1}    \ \  \ \ \to \ \ \ \ \    \cfrac{ r }{ 2}= \cfrac{22}{1} \ \  \ \ \to \ \ \ \ \ r=22*2=44 \ cm \\  \\  \\  C=2 \pi r=2*3.14*44=276.32  \ cm

Answer is 276.32 cm
6 0
3 years ago
The polynomial $f(x)$ has degree 3. If $f(-1) = 15$, $f(0)= 0$, $f(1) = -5$, and $f(2) = 12$, then what are the $x$-intercepts o
Alex_Xolod [135]

Your calculator's cubic regression function can tell you the equation is

... f(x) = 2x³ + 5x² -12x = x(x +4)(2x-3)

The x-intercepts are -4, 0, +1.5.

_____

If you want to solve this "by hand", you can first of all recognize that since there is an x-intercept at 0, the cubic will only have three coefficients. That is, you can write the equation as

... f(x) = ax³ + bx² + cx

Substituting the given points (except (0, 0)) gives three linear equations in a, b, c.

... -a +b -c = 15 . . . . . for x=-1

... a + b + c = -5 . . . . for x=1

... 8a +4b +2c = 12 . . for x=2

adding the first two equations gives 2b=10, or b=5. Now, you can reduce the system to

... a + c = -10

... 4a +c = -4

Subtracting the first of these equations from the second gives 3a=6, or a=2. That tells you c=-12 (from a+c=10).

Then your equation is

... f(x) = x(2x² +5x -12)

Factoring by any of the usual techniques, or graphing, or using the quadratic formula will tell you the zeros (x-intercepts) are as above.

_____

Since the input values are sequential, you can also develop the function from differences of the output values. Those are 15, 0, -5, 12. First differences are -15, -5, +17. Second differences are +10, +22. The third difference is 12. Using the first of these differences in appropriate places in the interpolating polynomial formula, we have

... f(x) = 15 + (x+1)(-15 + (x)/2·(10 + (x-1)/3·(12))) = 2x³ +5x² -12x . . . . as above

4 0
3 years ago
I need help big time.<br> What are the step by step math problem to (-3+2)^2<br> to get the answer?
Alexxx [7]
The answer is (-3+2)^2 =1
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2 years ago
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Reflexive Property, the property where the quantity equals itself.

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