Can someone please answer this questions please answer it correctly and please show work please help me I need it please

Mathematics

1 answer:

Len [333]4 years ago

8 0

Answer:

29. A

30. B

31. B

32. A

34. B

38. A

Step-by-step explanation:

29. A. All possible answers

B-D Incorrect

30. $44.56 - $10 = $34.56

$34.56 ÷ $0.08 = 432

31. 0.7 × 4k = 2.8k

0.7 × -12 = -8.4

0.7 (4k - 12) = 2.8k - 8.4

32. A = Pi × Radius^2

Large circle = 380.13

Small circle = 201.06

Subtract 380.13 - 201.06 = 179.07

34. 42/500 = 8.4% = 1/12

38. There is a 0 percent chance. It is impossible.

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In JKL, k=4.1 cm,j=3.8 cm and angle J=Q3^ Find all possible values of angle K , to the nearest inch of a degree .

spayn [35]

Answer:

74.0°

Step-by-step explanation:

In triangle JKL, k = 4.1 cm, j = 3.8 cm and ∠J=63°. Find all possible values of angle K, to the nearest 10th of a degree

Solution:

A triangle is a polygon with three sides and three angles. Types of triangles are right angled triangle, scalene triangle, equilateral triangle and isosceles triangle.

Given a triangle with angles A, B, C and the corresponding sides opposite to the angles as a, b, c. Sine rule states that for the triangle, the following holds:

$\frac{a}{sin(A)}=\frac{b}{sin(B)}=\frac{c}{sin(C)}$

In triangle JKL, k=4.1 cm, j=3.8 cm and angle J=63°.

Using sine rule, we can find ∠K:

$\frac{k}{sin(K)}=\frac{j}{sin(J)} \\\\\frac{4.1}{sin(K)}=\frac{3.8}{sin(63)} \\\\sin(K)=\frac{4.1*sin(63)}{3.8}\\\\sin(K)=0.9613\\\\K=sin^{-1} (0.9613)\\\\K=74.0^o \\$