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
Lunna [17]
4 years ago
12

Somebody help me with this please .

Mathematics
1 answer:
erastova [34]4 years ago
8 0

Step-by-step explanation:

12. Cos 60° = 8/c

0,5 = 8/c

0,5 c = 8

c = 16

D² = V16²-8²

= V256-64

=V192 = V16×12 = 4V12

= 4V4×3 = 8V3

13. Cos 30° = 6/b

V3/2 = 6/b

V3 b = 12

b = 12/V3

b/Sin B = a /sin A

b/Sin90° = 6/ sin 60°

<u>b</u> = <u> </u><u> </u><u> </u><u>6</u><u> </u><u> </u><u> </u>

1 V3/2

b× <u>V3</u> = 6

2

b = 6× 2/V3

= 12/V3

You might be interested in
(a) 3n – 11 &gt; 5n – 18
Bad White [126]

Answer:

Step-by-step explanation:

Bringing like terms on one side

-11 + 18 > 5n - 3n

-7 > 2n

-7/2 > n

7 0
3 years ago
Please help now. I’m very confused and i don’t no how to do this. I don’t want just the answer but a great explanation.
hoa [83]

Answer:

First option

Step-by-step explanation:

Hi there!

The "constant additive rate of change" means a constant slope.

The slope is \displaystyle\frac{change \hspace{4} in \hspace{4} y}{change \hspace{4} in \hspace{4} x}.

First of all, if the slope is constant, then we know immediately that it must be a linear function, a line. The change in <em>y</em> is forever the same according to the change in <em>x</em>. Knowing this, the second option is for-sure wrong (it's not a straight line).

Now, let's look at the first option. It is a linear function, which means it has a constant slope. However, we're given that the slope is -\displaystyle \frac{1}{4}. This means that for a line, whenever it travels 4 units to the right, it travels 1 unit <em>down </em>(it travels down whenever the slope is negative and up whenever the slope is positive).

This is the exact case for the first option. Look at the point (-2,2) on the line. When we move 4 units to the right of that point, The line would have moved 1 unit down. We would reach the point (2,1).

Therefore, the correct answer would be the first option.

I hope this helps!

6 0
3 years ago
Laura took 12 hours to read a 360 page book. At this rate, how long will it take her to read a 400 page book?
vesna_86 [32]
First, you would divide 360/12= 30 pages an hour, so then you would 400 / 30 = 13.3 hrs
8 0
3 years ago
What is cos 45º?<br> A<br> B<br> C<br> D
Keith_Richards [23]

0.53

Step-by-step explanation:

8 0
3 years ago
while exercising adam jogged 4 4/5 kilometers and walked 2 3/5 kilometers. What is the total distance he traveled
Angelina_Jolie [31]
7 2/5 should be the answer
4 0
3 years ago
Other questions:
  • The inner 1,000,000 is an exponent of ten is that true
    10·1 answer
  • 1 is less than or equal to w, and w is less than or equal to 9 write inequality
    8·1 answer
  • A number k increased by 7 is 34
    8·1 answer
  • If f (x) = -3x+6 and f(x) = 18, what is the value of x
    6·2 answers
  • How do you solve 6 3/4 divided by 2 1/2
    14·1 answer
  • What is the solution for this inequality? 3(x-4)&gt;5(x-2)-8
    8·1 answer
  • Which property is illustrated by 45+19=18+45
    13·2 answers
  • What is 1/2 of 1/3 of 1/5 of 60?
    10·2 answers
  • Please help! What is the domain of the function shown in the graph?
    5·1 answer
  • I need help with this question
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!