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galina1969 [7]
4 years ago
9

The law of cosine is A squared + B squared -2abcosC. find he value of 2abcosC 

Mathematics
1 answer:
Gnoma [55]4 years ago
8 0
D I think but not 100% sure
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Is this proportional
Nikitich [7]

Answer:

no

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Mrs wang is 23 years older than her daughter. I’m 5 years, their age will total 63. How old is each now?
Rom4ik [11]

Answer:

Mrs. Wang is 38 years old and her daughter is 15 years old.

Step-by-step explanation:

Explanation:

Let

x

=

the daughter's age

Mrs. Wang is

23

years older, so her age is

x

+

23

In five years, the daughter will be

x

+

5

years old

In five years, Mrs. Wang will be

x

+

23

+

5

=

x

+

28

years old

And, in five years the sum of their ages will be 63, so...

x

+

5

+

x

+

28

=

63

Combine like terms

2

x

+

33

=

63

a

a

−

33

a

−

33

a

a

a

Subtract 33 from both sides

2

x

a

a

a

a

a

=

30

2

x

2

=

30

2

a

a

a

Divide both sides by 2

x

=

15

a

a

a

The daughter is 15

x

+

23

=

15

+

23

=

38

a

a

a

Mrs. Wang is 38

8 0
4 years ago
A set of data already has the values 11, 14, 23, and 16. What value would have to be added to the set for the mean of the
poizon [28]

Answer: 26

Step-by-step explanation:

Mean = total sum of data set / frequency of data set

6 0
3 years ago
If f(x) = 5-2x find f(9)+ 3
ioda

f (9) = 5 - 2 (9)

f (9) = 5 - 18

f (9) = - 13

f (9) + 3 = - 13 + 3

f (9) + 3 = - 10

6 0
3 years ago
Read 2 more answers
Henry's current age is 10 times Justin's current age. In 6 years Henry's age will be 4 times Justin's age. Which system of equat
Gala2k [10]
H=henry's age
j=justin's age


h=10j

in 6 years (h+6 and j+6)
h+6=4(j+6)


the equations are
h=10j and
h+6=4(j+6)


C is answer
6 0
3 years ago
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