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Galina-37 [17]
3 years ago
8

I dont understand nothing for math because they teach us hard ways to do it even tho that's how u actually have to do it

Mathematics
2 answers:
Semmy [17]3 years ago
6 0

Answer:

First Picture: A

Second Picture: C

Third Picture: B

Forth Picture: C

Fifth Picture: C

Step-by-step explanation:

yKpoI14uk [10]3 years ago
3 0
The order is ACBCC and if it’s not I’m sorry
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Math Escape Level 3 plz hurry it is due to today bestie
fenix001 [56]

Answer:

1

Step-by-step explanation:

x-9=-8

x=-8+9

x=1

8 0
3 years ago
Prove that:<br>tan80°=2tan 70°+ tan10°​
Angelina_Jolie [31]
Tan80=5.67
2tan70+tan10=5.67

So tan80=2tan70+tan10
8 0
3 years ago
Read 2 more answers
A rubber ball has a radius of about 2.86 in. Can the ball be packaged in a box shaped like a cube with a volume of 125 in3?
Sonja [21]

volume of the ball = 4/3 * PI *r^3 =

4/3 * 3.14 * 2.86^3 = 97.99 cubic inches

 this is less than the volume of the box, so yes it will fit

6 0
3 years ago
The number of salmon swimming upstream to spawn is approximated by the following function:
umka2103 [35]

Answer:

The water temperature that produces the maximum number of salmon swimming upstream is approximately 12.305 degrees Celsius.

Step-by-step explanation:

Let S(x) = -x^{3}+2\cdot x^{2}+405\cdot x +4965, for 6 \leq x \leq 20. x represents the temperature of the water, measured in degrees Celsius, and S is the number of salmon swimming upstream to spawn, dimensionless.

We compute the first and second derivatives of the function:

S'(x) = -3\cdot x^{2}+4\cdot x +405 (Eq. 1)

S''(x) = -6\cdot x +4 (Eq. 2)

Then we equalize (Eq. 1) to zero and solve for x:

-3\cdot x^{2}+4\cdot x +405 = 0

And all roots are found by Quadratic Formula:

x_{1} \approx 12.305\,^{\circ}C, x_{2}\approx -10.971\,^{\circ}C

Only the first root is inside the given interval of the function. Hence, the correct answer is:

x \approx 12.305\,^{\circ}C

Now we evaluate the second derivative at given result. That is:

S''(12.305) = -6\cdot (12.305)+4

S''(12.305) = -69.83

According to the Second Derivative Test, a negative value means that critical value leads to a maximum. In consequence, the water temperature that produces the maximum number of salmon swimming upstream is approximately 12.305 degrees Celsius.

5 0
3 years ago
An octagonal pyramid ... how many faces does it have, how many vertices and how many edges? A triangular prism ... how many face
nadezda [96]

1: 8 faces and 9 with the base 9 vertices and 16 edges

2: 3 faces and 5 with the bases 6 vertices and 9 edges

3: 3 faces and 4 with the base 4 vertices and 6 edges

Hope this can help you.

4 0
3 years ago
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