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jeka94
3 years ago
9

Add 3 1/4. And 1 3/4

Mathematics
2 answers:
makkiz [27]3 years ago
8 0

Answer: 5


Step-by-step explanation:

3 1/4 + 1 3/4

First:

3 1/4 = 3*4/4+1/4 = 12/4+1/4 = (12+1)/4 = 13/4

Second:

1 3/4 = 4/4+3/4 = (4+3)/4 = 7/4

Then:

13/4 + 7/4 = (13+7)/4 = 20/4 = 5

Sav [38]3 years ago
3 0

Answer:

the sum is 5

Step-by-step explanation:


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(X^4)-(45x^2)+324 what are the zeroes? And how many turning points?
dmitriy555 [2]

Zeroes:

We must solve

x^4-45x^2+324=0

To do so, we define the auxiliary variable t=x^2. The equation becomes

t^2-45t+324=0

The quadratic formula yields the solutions

t=9,\quad t=36

Substituting back t=x^2 gives

x^2=9 \iff x=\pm 3,\quad x^2=36 \iff x=\pm 6

So, the zeroes are -6, -3, 3, 6.

Turning points:

Turning points are points where a function stops being increasing to become decreasing, or vice versa. Since functions are increasing when their first derivative is positive and decreasing when it's negative, turning points are points where the first derivative is zero.

We have

f(x)=x^4-45x^2+324 \implies f'(x)=4x^3-90x

If we set the derivative to be zero, we have

4x^3-90x=0 \iff x(4x^2-90)=0

So, the derivative is zero if x=0 or

4x^2=90 \iff 2x^2=45 \iff x^2=\dfrac{45}{2}\iff x=\pm\sqrt{\dfrac{45}{2}}

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Step-by-step explanation:

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The Pyraminx is a Rubik's cube-type toy in the shape of a tetrahedron. The Pyraminx shown below has edges 15\,\text{cm}15cm long
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Answer:

8.727

Step-by-step explanation:

Since the below edge, d = 15 cm, and the height, h = 12.2 cm, we will use the Pythagorean  theorem to find the distance r.

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Step-by-step explanation:

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