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
Keith_Richards [23]
3 years ago
6

Can someone help me on this​

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
4 0

Answer:

m∠A = 91°

Step-by-step explanation:

∠A ≅ ∠B (Vertical Angle Theorem). This means that the two angles will have the same measurements.

Note that a straight line = 180° (Definition of a Straight Line).

Find the value of m∠B.

180 - 47 - 42 = m∠B

m∠B = 180 - (89)

m∠B = 91°

Remember that ∠B & ∠A are vertical angles, so they will have the same measurement.

m∠A = 91°

~

You might be interested in
5.<br> 12.8 ft<br> 9 ft<br> 9 ft
kykrilka [37]

Answer:

what do we have to solve? surface area? volume?

3 0
3 years ago
Read 2 more answers
Can someone please help
Westkost [7]

Answer: B & D

<u>Step-by-step explanation:</u>

A is not correct because it says "in the city" instead of "in Elan's school"

C is not correct because it says do NOT ....

4 0
3 years ago
What is the value of the expression?
Morgarella [4.7K]
13.23 is the answer for that equation
8 0
3 years ago
Read 2 more answers
Use chain rule to find dw/dt w=ln(x^2 + y^2 + z^2)^(1/2) , x=sint, y=cost, z=tant
son4ous [18]
The chain rule states that

\dfrac{\mathrm dw}{\mathrm dt}=\dfrac{\partial w}{\partial x}\dfrac{\mathrm dx}{\mathrm dt}+\dfrac{\partial w}{\partial y}\dfrac{\mathrm dy}{\mathrm dt}+\dfrac{\partial w}{\partial z}\dfrac{\mathrm dz}{\mathrm dt}

Since \ln(x^2+y^2+z^2)^{1/2}=\dfrac12\ln(x^2+y^2+z^2), you have

\dfrac{\partial w}{\partial x}=\dfrac x{x^2+y^2+z^2}
\dfrac{\partial w}{\partial x}=\dfrac y{x^2+y^2+z^2}
\dfrac{\partial w}{\partial z}=\dfrac z{x^2+y^2+z^2}

and

\dfrac{\mathrm dx}{\mathrm dt}=\cos t
\dfrac{\mathrm dy}{\mathrm dt}=-\sin t
\dfrac{\mathrm dz}{\mathrm dt}=\sec^2t

Also, since x^2+y^2+z^2=\sin^2t+\cos^2t+\tan^2t=1+\tan^2t=\sec^2t, the derivative is

\dfrac{\mathrm dw}{\mathrm dt}=\dfrac{\sin t\cos t}{\sec^2t}-\dfrac{\sin t\cos t}{\sec^2t}+\dfrac{\tan t\sec^2t}{\sec^2t}
\dfrac{\mathrm dw}{\mathrm dt}=\tan t
4 0
3 years ago
The measure of angle A is 15°, and the length of side
dangina [55]

Answer:

Part 1) AB=30.9\ units

Part 2) AC=29.9\ units

Step-by-step explanation:

The picture of the question in the attached figure

Part 1

Find the length side AB

we know that

sin(A)=\frac{BC}{AB} ----> by SOH (opposite side divided by the hypotenuse)

substitute the given values

sin(15^o)=\frac{8}{AB}

solve for AB

AB=\frac{8}{sin(15^o)}=30.9\ units

Part 2

Find the length side AC

we know that

tan(A)=\frac{BC}{AC} ----> by TOA (opposite side divided by the adjacent side)

substitute the given values

tan(15^o)=\frac{8}{AC}

solve for AC

AC=\frac{8}{tan(15^o)}=29.9\ units

8 0
3 years ago
Other questions:
  • Natalie's savings is 4/7 of Bernice's savings. After Bernice bought a cap which cost $15 , her saving would be $9 more than Nata
    15·1 answer
  • 23.
    11·1 answer
  • 1 Look at the example problem. How would the partial
    11·1 answer
  • A solid figure with out any bases and only one curved surface
    11·2 answers
  • Please help! 20 points and brainly!!
    8·1 answer
  • Help me with this math question please I'm giving away brainliests​
    11·2 answers
  • Incase you need to answer some questions, how was your day? :))
    12·2 answers
  • MATH PLEASE HELP ASAP
    6·1 answer
  • Evaluate the expression and enter the answer as a fraction in lowest terms, using the slash ( / ) for the fraction bar.
    12·1 answer
  • What are some ways ou can represent a proportional relationship?equations ,or graphs,or tables ,or can be all of them
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!