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CaHeK987 [17]
3 years ago
14

Use the law of cosines to find the value of 2*4*5 cos theta

Mathematics
2 answers:
Lena [83]3 years ago
6 0

Answer:

The answer is 37

Step-by-step explanation:

sweet-ann [11.9K]3 years ago
3 0
We can proceed in solving the problem since all information are given such as 2*4*5costheta.
we have a=4, b=5, and C=theta
let us solve for "c" using Pythagorean
c²=a²+b²
c²=4²+5²
c=6.4
Solving for theta or C
c²=a²+b²-2abcosC
6.4²=4²+5²-2*4*5*cosC
C=90

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Simultaneous equations<br> x^2+3xy=10<br> x=2y
satela [25.4K]

9514 1404 393

Answer:

  (x, y) = (-2, -1) or (2, 1)

Step-by-step explanation:

Substitute for x in the first equation:

  (2y)^2 +3(2y)y = 10

  10y^2 = 10

  y^2 = 1

  y = ±1

  x = 2y = ±2

Solutions are (x, y) = (-2, -1) or (2, 1).

8 0
2 years ago
Suppose you have just enough money, in coins, to pay for a gallon of milk priced at $2.40. You have 12 coins, all quarters and d
wel
The answer is
q + d = 12
0.25q + 0.10d = 2.40


q - the number of quarters
d - the number of dimes

You have 12 <span>coins, all quarters and dimes:
q + d = 12

The value of 1 quarter is $0.25.
The value of 1 dime is $0.10.
Therefore, if you want to pay </span>$2.40 you will have q quarters of value $0.25(0.25q) and d dimes of value $0.10d (0.10d).
The second equation is:
0.25q + 0.10d = 2.40
3 0
3 years ago
A bag has 3 red marbles, 2 blue, 4 green and 1 yellow. What is the theoretical probability of pulling a red marble? Write your a
Dimas [21]

Answer:

3/10,.3,30%

Step-by-step explanation:

3 0
3 years ago
SOMEONE HELP ME PLEASE
rjkz [21]

Answer:

(36+22+19)=77

then add red and yellow

=(36+22)

=58

then the probability will be

58/77

HOPE IT HELP YOU.......

6 0
2 years ago
Samantha received a loan from the bank of 4500 she’s plans on paying off the loan and for years at the end of four years Samanth
zheka24 [161]
At the end it will be 20% interest.
6 0
3 years ago
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