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goldfiish [28.3K]
4 years ago
12

Help me with these please

Mathematics
1 answer:
dimulka [17.4K]4 years ago
7 0
8) Area of a triangle equals 1/2 times base times height. The height in this case is 17, and the base is 74. 
1/2 x 17 x 74 = 1/2 x 1258 = 629
Final answer: 629 ft^{2}

9)Area of a parallelogram equals base times height. Multiply 471.5 by 21.3. 
The final answer should be 10042.95
Final answer: 10042.95 
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What are the solutions of the equation 2x2−x=32x2-x=3?
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3 years ago
Answer please no work needed
lozanna [386]
Answer: choice B
Angle A = 63 degrees
side a = 13.4
side b = 6.8

-----------------------------------------------
-----------------------------------------------

Given Info:
Angle C = 90 degrees
Angle B = 27 degrees
side c = 15

What is needed to be found:
Angle A, side a, side b

Finding side a
cos(angle) = adjacent/hypotenuse
cos(B) = BC/AB
cos(B) = a/15
cos(27) = a/15
15*cos(27) = a
13.3650978628256 = a
a = 13.3650978628256
a = 13.4

Finding side b
Using the pythagorean theorem
a^2 + b^2 = c^2
(13.3650978628256)^2 + b^2 = 15^2
178.625840882906 + b^2 = 225
178.625840882906 + b^2 - 178.625840882906 = 225 - 178.625840882906
b^2 = 46.374159117094
sqrt(b^2) = sqrt(46.374159117094)
b = 6.809857496093
b = 6.8

Finding angle A
sin(angle) = opposite/hypotenuse
sin(A) = BC/AB
sin(A) = a/c
sin(A) = 13.3650978628256/15
sin(A) = 0.89100652418838
arcsin(sin(A)) = arcsin(0.89100652418838)
A = 63.0000000000016
A = 63
5 0
3 years ago
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