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rosijanka [135]
2 years ago
11

Someone pleaseeee answer

Mathematics
1 answer:
svet-max [94.6K]2 years ago
4 0

Answer:

A

Step-by-step explanation:

We cannot take the square root of a negative number without using complex numbers. Because of this, both 5x and x+3 must be non-negative in order for the product to be defined.

  • 5x ≥ 0 implies that x ≥ 0
  • x + 3 ≥ 0 implies that x ≥ -3

Both of these are satisfied if and only if x ≥ 0 (note that if x ≥ 0, then x is automatically greater than or equal to -3). Therefore, the correct answer is x ≥ 0.

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An angle measures 48 degrees. What is the measure of its supplement?
Masteriza [31]

Answer:

Supplement: 132

Complement: 42

Step-by-step explanation:

I don't really have an explanation, the answer just came to me...Sorry. But hope this helps!

5 0
3 years ago
Use the value of the discriminant to determine the type of roots for x²-3x+1=0
nignag [31]

Hi,

Δ = 9 - 4 * 1 * 1 = 5

the roots are :

x1 = (3 - √5) / 2

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7 0
3 years ago
Determine whether the given value is a solution of the equation.<br> 7w = 73; w = 10
kipiarov [429]

Step-by-step explanation:

When w=10, 7w=7×10=70

But the given value of 7w is 73.

So, the given value is not a solution of the equation.

8 0
2 years ago
The rate at which a body cools also depends on its exposed surface area S. If S is a constant, then a modification of (2), given
padilas [110]

Answer:

  76.25°

Step-by-step explanation:

The solution to the differential equation is an exponential curve with a horizontal asymptote at Tm. It passes through (0, 145) and (30, 95), so the equation can be written as ...

  T = 80 +65((95-65)/(145-65))^(t/30)

  T = 80 +65(3/8)^(t/30)

That is, the temperature difference is reduced to 3/8 of its original value in 30 minutes.

Since the coffee in cup B cools twice as fast, it will cool to the same temperature (95°) in 15 minutes. In the next 15 minutes, the temperature difference will be reduced to (3/8)^2 of the original 80°, so will be 11.25°. That is, the temperature of cup B will be ...

  11.25° +65° = 76.25°

after 30 minutes.

8 0
3 years ago
Pls help me with this, (show work please) THANK YOU SO MUCH!!
den301095 [7]
D.) -20 degrees Fahrenheit because -12 degrees plus eight equals negative 20 degrees Fahrenheit
7 0
3 years ago
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