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aniked [119]
2 years ago
9

Suppose a triangle has two sides of length 3 and 4 and that the angle

Mathematics
2 answers:
rodikova [14]2 years ago
4 0

Answer:

B

Step-by-step explanation:

We can use the law of cosinse:

c^{2} = a^{2} + b^{2} − 2ab cos(C)

Suppose the two sides are a and b, and the angle betweent them is C.

c^{2} = 3^{2} + 4^{2} − 2*3*4 cos(60)

We can simplify this to get c^{2} =25-12=13

c=\sqrt{13}

Answer choice B

frozen [14]2 years ago
4 0

Answer:

Step-by-step explanation:

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The price of a jacket was reduced from $80 to $64. By what percentage was the price of the jacket reduced?
aleksley [76]

Answer:

The asnwer is 20%

Step-by-step explanation:

80 times .20 is 16, 80-16 is 64, hoipe i helped!

7 0
2 years ago
Solve the equation: <br>x^2+3x-7=0 <br>give your answer to 2 decimal places
Kaylis [27]

Answer:

x1 = 1.54

x2 = -4.54

Step-by-step explanation:

just use calculator

4 0
3 years ago
What is 12-11a=45<br> What is a?<br><br> 100 points
Lelu [443]

Answer:

a=-3

Step-by-step explanation:

-11a=45-12

-11a=33

a= -33/11

a=-3

3 0
3 years ago
Read 2 more answers
Kara and Sonny went to see a movie at the local theater.
CaHeK987 [17]

Answer:

popcorn=4$

soft drink=4.5$

Step-by-step explanation:

  • if we used omitting method:

1-we multiply (p+s=8.5) by (-2) so we could get rid of (s) and be leftover with (p)

so: (-2p-2s= -17)

2- we subtract this equation from (p+2s=13) and the result will be (-p= -4)

3- divide them by (-1) and the result is (p=4)

4-(p+s=8.5) ,substitute (p) with (4) and make it go to the other side with negative sign and the result of (s) is (8.5-4=4.5)

  • if we used substituting method:

1-(p+s=8.50), we will make (s) go to the other side with negative sign so the result is (p=8.50-s)

2-(p+2s=13.00), substitute (p) with (8.50-s):

(8.50-s+2s=13)

3- make (8.50) go to the other side with negative sign:

(s=13-8.50=4.5) and then you could get (p)

8 0
3 years ago
8. find the simplified form of the expression. give your answer in scientific notation. (3 x 10^6) (8 x 10^-4) a) 1.1 x 10^3 b)
andrew-mc [135]
(3 x 10^6)(8 x 10^-4) = (3 x 8) x 10^(6 - 4) = 24 x 10^2 = 2.4 x 10^3
5 0
3 years ago
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