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guajiro [1.7K]
3 years ago
11

-(-81/-9) is this positive or negative?

Mathematics
1 answer:
Delvig [45]3 years ago
8 0
Negative. There are - < these signs before the numbers, so that means they’re negative
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Is 5a-9b+a-6b equal to 6a-15?
pashok25 [27]
Surely not;
5a+a-9b-6b
6a-15b
So,
5a-9b+a-6b=6a-15b
It's not equal to 6a-15


7 0
3 years ago
The graph of y = - 1/2x +2 is positive over the interval (-♾,4) and negative over the interval (4,♾). What happens on the graph
SCORPION-xisa [38]

Answer:

There is no solution when x=4

Step-by-step explanation:

By drawing the graph, we can see that x = 4 is a vertical asymptote. An asymptote is a line in which the graph approaches it but never meets it. As a result, the graph will never approach x=4. This means there is no solution at x = 4

5 0
3 years ago
Please help me! I will give brainliest to the person who answers correctly.
Sveta_85 [38]

Answer:

  • sin(X) = 6/7.5
  • XY = 4.5
  • cos(X) = 4.5/7.5
  • tan(X) = 6/4.5

Step-by-step explanation:

It is convenient to use the Pythagorean theorem to find XY to start with. That theorem tells you ...

  XZ² = YZ² + XY²

Solving for XY, you find ...

  XY² = XZ² - YZ²

  XY = √(XZ² - YZ²) = √(7.5² -6²) = √(56.25 -36) = √20.25

  XY = 4.5

The mnemonic SOH CAH TOA is very helpful here. It reminds you that ...

  Sin = Opposite/Hypotenuse

  sin(X) = 6/7.5

  Cos = Adjacent/Hypotenuse

  cos(X) = 4.5/7.5

  Tan = Opposite/Adjacent

  tan(X) = 6/4.5

_____

<em>Comment on the triangle and ratios</em>

The side lengths of this triangle are in the ratios ...

  XY : YZ : XZ = 3 : 4 : 5

If you recognize that the given sides are in the ratio 4 : 5, this tells you that you have a "3-4-5" right triangle with a scale factor of 1.5. At least, you can find XY = 1.5·3 = 4.5 with no further trouble.

The trig ratios could be reduced to sin(X) = 4/5; cos(X) = 3/5; tan(X) = 4/3, but the wording "don't simplify" suggests you want the numbers shown on the diagram, not their reduced ratios.

3 0
4 years ago
The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia. One of the chemical compounds prod
Klio2033 [76]

Answer:

45.94%

Step-by-step explanation:

Probability-Above 45.94%

Z =0.1  

x= 61

µ 60

σ 9.8

6 0
4 years ago
In your lab, a substance's temperature has been observed to follow the function T()- (x- 2)3 +8. The turning point of the graph
Vlad1618 [11]

We have the function:

T(x)=(x-2)^3+8

A turning point happens when the function reaches a maximum or a minimum.

In that points the value of the first derivative of the function is equal to 0.

So we can find the turning points by finding the first derivative and equal to zero:

undefined

6 0
1 year ago
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