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DedPeter [7]
4 years ago
6

I need help please. Mathquiz

Mathematics
1 answer:
gizmo_the_mogwai [7]4 years ago
8 0
Choose c about 625mi^2
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the average marks of the first 10 students are 17 and that of the next 15 students is 18. find the mean of 25 students?
Alex787 [66]

Answer:

20

_____

10 = 17

15 = 18

20 = 19

25 = 20

6 0
3 years ago
What is the sum of the rational expression below 3x/x+9 + x/x-4
fredd [130]
The answer to the question

6 0
4 years ago
17-19, deal with the ambiguous SSA. For each, find all possible solutions and sketch the triangle(s) in each case
Tatiana [17]

The possible solutions using the Sine Law are given as follows:

Triangle A:
B = 50.26°

C = 79.74°

Triangle B:

B = 62.79°

C = 70.21°

<h3>What is the sine Rule?</h3>

The sine law asserts that the ratio of a triangle's side length to the sine of the opposing angle is the same for all three sides. The sine rule is another name for it.

<h3>What is the explanation for the above solution?</h3>

Triangle A

Given the sine law:
a/SinA = b/SinB

Hence

Sin B = (b/a) SinA

Sin B = 15/10 (Sin 50)

Sn B = (15/10) * 0.766

Sin B = 1.5 * 0.766

B = Sin⁻1 (1.14)

B = 50.26°

Hence, C =

180 - B - A

= 180 - 50.26 - 50

C = 79.74°

Solution B

Given the sine law:

a/SinA = b/SinB

Hence

Sin B = (b/a) SinA

Sin B = 2/1.6 (Sin 47)

Sn B = 1.25 * 0.73

Sin B = 0.9125

B = Sin⁻1 (0.9125)

B = 62.79°

Hence,

C = 180 - 62.79 - 47

C = 70.21°

Learn more about the Sine Law at;
brainly.com/question/12271113
#SPJ1

8 0
2 years ago
Solve this system of equations with matrices. x – 5y – 4z = 15 -3x +2y + 3z = -6 4x + 8y – 2z = 3
Lelechka [254]

Answer:

x = 59/10, z = 237/70, and y = -121/70

Step-by-step explanation:

5 0
3 years ago
6th grade math i mark as brainliest​
CaHeK987 [17]
The answer would be C, sorry if I’m wrong
5 0
3 years ago
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