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drek231 [11]
3 years ago
12

What is the sum of 70 and 80​

Mathematics
1 answer:
Hunter-Best [27]3 years ago
5 0

Answer:

150

Step-by-step explanation:

The calculator :)

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6 0
2 years ago
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HELP I NEED THE ANSWEERRRR
Murljashka [212]

Answer:

The number of miles the train travels in an hour.

Step-by-step explanation:

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2 years ago
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How do you do these questions?
Lady bird [3.3K]

Answer:

(e) csc x − cot x − ln(1 + cos x) + C

(c) 0

Step-by-step explanation:

(e) ∫ (1 + sin x) / (1 + cos x) dx

Split the integral.

∫ 1 / (1 + cos x) dx + ∫ sin x / (1 + cos x) dx

Multiply top and bottom of first integral by the conjugate, 1 − cos x.

∫ (1 − cos x) / (1 − cos²x) dx + ∫ sin x / (1 + cos x) dx

Pythagorean identity.

∫ (1 − cos x) / (sin²x) dx + ∫ sin x / (1 + cos x) dx

Divide.

∫ (csc²x − cot x csc x) dx + ∫ sin x / (1 + cos x) dx

Integrate.

csc x − cot x − ln(1 + cos x) + C

(c) ∫₋₇⁷ erf(x) dx

= ∫₋₇⁰ erf(x) dx + ∫₀⁷ erf(x) dx

The error function is odd (erf(-x) = -erf(x)), so:

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7 0
3 years ago
The temperature T in degrees Celsius of a liquid t minutes after heating is given by the formula T=8√t. When is the temperature
Advocard [28]
T=8√t
T=temperature
t=time in minutes.
If T=48, we have to calculate the time.

48=8√t
(48)²=(8√t)²
2304=64t
t=2304 / 64=36

answer: 48 degrees Celsius will be reached in 36 minutes. 
3 0
2 years ago
M is directly proportinal to r^2 when r = 2 m= 14 work out the value of m
attashe74 [19]

Answer:

14?

Step-by-step explanation:

4 0
3 years ago
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