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sergeinik [125]
2 years ago
7

Help me please quickly

Mathematics
1 answer:
Akimi4 [234]2 years ago
6 0

Answer:

x ≥ 1

Step-by-step explanation:

→ As it is a shaded circle you know it ≤ or ≥

x ≥ 1

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Please please help!!!!!
algol13

Answer:

Its 58

Step-by-step explanation:

Because the bigger triangle is a dilation of the smaller one. In other words only the sides get bigger, the angles stay the same.

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3 years ago
a crystal that is 0.12 millimeters long appears to be 60 millimeters long under a microscope what is the power of the microscope
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2 years ago
At 7:00 A.M., Alicia pours a cup of tea whose temperature is 200°F. The tea starts to cool to room temperature (72°F). At 7:02 A
alexgriva [62]

Answer: A) Option B

B) 22.3 minutes.

Step-by-step explanation:

The temperature decreases in an exponential decrease, this means that we can write the equation as:

T(x) = A*r^x + B

Where A is the difference between the initial temperature and the room temperature, B is the room temperature, and r is a positive number smaller than 1, that says "how fast" the temperature decreases (and x is the variable, in units of time)

We know that the initial temperature

A = 200° - 72° = 128°

B = 72°

T(x) = 128°r^x + 72°

The only option with those two values is option B.

T(x) =  128(0.989)^x + 72

We should check that when x = 2m, the temperature must be 197°

T(2m) = 128*(0.989)^2 + 72 = 197.2° (that we can round down to 197°)

So this equation is correct

Now we want to find the time such the temperature is 172°F

then:

172° = 128°(0.989)^x + 72°

100° = 128°(0.989)^x

100/128 = (0.989)^x

x = ln(100/128)/ln(0.989) = 22.3 minutes.

Let's check in our equation:

T(22.3) =  128°(0.989)^22.3 + 72 = 172°

8 0
3 years ago
81-1 1/5x < 55
Norma-Jean [14]

Answer:

A. I guess

Step-by-step explanation:

not really sure

8 0
1 year ago
The graph of a 10th-degree polynomial must cross the x-axis exactly once? True or False?
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Hmm idk hard one jnmmdmkrkror
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