1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
agasfer [191]
3 years ago
8

Kelly and Daniel wrote the following proofs to prove that vertical angles are congruent. Who is correct?

Mathematics
2 answers:
denpristay [2]3 years ago
7 0

Answer:

Daniel is correct and Kelly is not

Step-by-step explanation:

Basically, Kelly does not use the right terms needed to prove the angles are congruent but Daniel does.

levacccp [35]3 years ago
3 0
Daniel is correct, but Kelly is not
You might be interested in
Simplify the expression by using a double-angle formula. −2cos2π91
Hatshy [7]
The Answer of <span>−2cos2π91 =</span> is -2 
7 0
3 years ago
F(7)=3/x+2-squar root x-3
leonid [27]
Insert x = 7
so 3/(7+2) - sqr (7-3)
=3 / (9) - sqr (4)
= 1/3 - 2
=1/3 - 6/3
= -5/3
8 0
3 years ago
What is the value of y in the product of powers below? 8^3x8^-5x8^y=8^-2=1/8^2​
Ber [7]
The answer is y=207 hope this helps
4 0
2 years ago
A small metal bar, whose initial temperature was 10° C, is dropped into a large container of boiling water. How long will it tak
IgorC [24]

Answer

According to newton law of cooling

\dfrac{d T}{dt} = k (T - T_a)

and

T = Ce^{kt} + T_a

now At Ta = 100

T₀ = 10 °C

T₁ = 12° C

T(0) = Ce^{0} + T_a

10 = C + 100

C = -90

now,

12 = -90e^k + 100

e^k = \dfrac{88}{90}

k = ln{\dfrac{88}{90}}

at time equal to t

T(t) = 70

T(t) = -90 (\dfrac{88}{90})^t + 100

70 = -90(\dfrac{88}{90})^t + 100

(\dfrac{88}{90})^t = \dfrac{1}{3}

t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{3})

t = 48.88 s

hence, after 48.88 s the temperature of the body will be 70°C

b) time taken to reach 98°C

T(t) = -90 (\dfrac{88}{90})^t + 100

98 = -90(\dfrac{88}{90})^t + 100

(\dfrac{88}{90})^t = \dfrac{1}{45}

t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{45})

t = 390 s

hence, after 390 s the temperature of the body will be 98°C

5 0
3 years ago
Trevor was paid $960 last week for working 40hours. What is Trevor's hourly pay rate before taxes?
Mekhanik [1.2K]
He gets paid 24 dollars an hour 960/40=24
4 0
3 years ago
Read 2 more answers
Other questions:
  • A train travels 190 km in 3.0 hours and then 120 km in 2.0 hours. What is its average speed?
    6·1 answer
  • Beatrice calculated the slope between two pairs of points.
    9·2 answers
  • Please help I will mark brainly!!
    7·2 answers
  • Consider randomly selecting a student at a large university, and let A be the event that the selected student has a Visa card an
    8·1 answer
  • PLEASE HELP!!!!! very urgent asap!!! need help please
    12·2 answers
  • One of the legs of a right triangle measures 15 cm and its hypotenuse measures 17 cm. Find the measure of the other leg. If nece
    6·2 answers
  • The highest temperature recorded in the town of
    15·1 answer
  • Answer and solve for brainlist
    6·1 answer
  • HELPPPP IM GIVING BRANLEISTTTT PLESE HURRY ITS DUE IN 20 minssss!!!!!!!!!!!!!!!!!!!!!!!!!!
    7·2 answers
  • Plz help me! I’m not sure how to do these!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!