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
Lyrx [107]
3 years ago
7

0.7 is 10 times as much as

Mathematics
1 answer:
Neko [114]3 years ago
3 0
0.7 is 10 times as much as 0.70
You might be interested in
I need help with questions #7 and #8 plz
katen-ka-za [31]

Answer:

7. A = 40.8 deg; B = 60.6 deg; C = 78.6 deg

8. A = 20.7 deg; B = 127.2 deg; C = 32.1 deg

Step-by-step explanation:

Law of Cosines

c^2 = a^2 + b^2 - 2ab \cos C

You know the lengths of the sides, so you know a, b, and c. You can use the law of cosines to find C, the measure of angle C.

Then you can use the law of cosines again for each of the other angles. An easier way to solve for angles A and B is, after solving for C with the law of cosines, solve for either A or B with the law of sines and solve for the last angle by the fact that the sum of the measures of the angles of a triangle is 180 deg.

7.

We use the law of cosines to find C.

18^2 = 12^2 + 16^2 - 2(12)(16) \cos C

324 = 144 + 256 - 384 \cos C

-384 \cos C = -76

\cos C = 0.2

C = \cos^{-1} 0.2

C = 78.6^\circ

Now we use the law of sines to find angle A.

Law of Sines

\dfrac{a}{\sin A} = \dfrac{b}{\sin B} = \dfrac{c}{\sin C}

We know c and C. We can solve for a.

\dfrac{a}{\sin A} = \dfrac{c}{\sin C}

\dfrac{12}{\sin A} = \dfrac{18}{\sin 78.6^\circ}

Cross multiply.

18 \sin A = 12 \sin 78.6^\circ

\sin A = \dfrac{12 \sin 78.6^\circ}{18}

\sin A = 0.6535

A = \sin^{-1} 0.6535

A = 40.8^\circ

To find B, we use

m<A + m<B + m<C = 180

40.8 + m<B + 78.6 = 180

m<B = 60.6 deg

8.

I'll use the law of cosines 3 times here to solve for all the angles.

Law of Cosines

a^2 = b^2 + c^2 - 2bc \cos A

b^2 = a^2 + c^2 - 2ac \cos B

c^2 = a^2 + b^2 - 2ab \cos C

Find angle A:

a^2 = b^2 + c^2 - 2bc \cos A

8^2 = 18^2 + 12^2 - 2(18)(12) \cos A

64 = 468 - 432 \cos A

\cos A = 0.9352

A = 20.7^\circ

Find angle B:

b^2 = a^2 + c^2 - 2ac \cos B

18^2 = 8^2 + 12^2 - 2(8)(12) \cos B

324 = 208 - 192 \cos A

\cos B = -0.6042

B = 127.2^\circ

Find angle C:

c^2 = a^2 + b^2 - 2ab \cos C

12^2 = 8^2 + 18^2 - 2(8)(18) \cos B

144 = 388 - 288 \cos A

\cos C = 0.8472

C = 32.1^\circ

8 0
2 years ago
8 cm
Sergio039 [100]

Answer:

320 cm³

Step-by-step explanation:

none of the above

8 × 10 × 4

80 × 4

320 cm³

6 0
2 years ago
A bag of 8 apples cost $2.88. What is the cost of one apple
k0ka [10]
You have to use the formula cost over quantity Divide 8 and $2.88 The answer is. 0.36
6 0
3 years ago
Are all parallelograms squares?
pav-90 [236]
No at least two side need to be parallel to be that so almost anything will be your answer
6 0
3 years ago
Read 2 more answers
I'll give u brianliest if you share the answer and how you got it
Bogdan [553]

Answer:a is 52    b is 65

Step-by-step explanation:

a:Write 65% as 65100.

65100 of 80 = 65100 × 80.

Therefore, the answer is 52. If you are using a calculator, simply enter 65÷100×80 which will give you 52 as the answer.

b: it is 65 because it is the same question but in reverse which still gives you the same answer.

Hope this helps

please give brainlyist

6 0
3 years ago
Read 2 more answers
Other questions:
  • In the metric system, what is added to the base unit to create specific values?
    11·2 answers
  • suppose the divisor and the dividend of a division problem are both fractions between 0 and 1, and the divisor is greater than t
    6·2 answers
  • The length of a rectangle is 3 meters less than twice is width
    7·1 answer
  • Factor the trinomial below.
    8·1 answer
  • A circle has a circumference of 120 meters What is the measure of its radius? Round
    5·1 answer
  • How many outfits can you get from 5 suits, 7 shirts, 4 ties and 6 hats
    7·1 answer
  • Ben Pumpiniron applies an upward force to lift a 129-kg barbell to a height of 1.98 m at a constant speed. How much work has Bee
    7·2 answers
  • The type of match to use in a Vlookup() function to assess the resort fee as a possible additional cost for a particular room is
    11·1 answer
  • What is the graph of the equation y = -1/4 x + 2
    10·1 answer
  • 45,678 in unit form
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!