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rajenkins79
27.07.2019 •
Mathematics
Larry baked 3 times as many sugar cookies as peanut butter cookies. he baked 96 cookies in all. how many did he bake in all
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Ответ:
sugar cookies = 96 cookies *3/4 = 72 cookies
peanut butter cookies= 96 cookies* 1/4 = 24 cookies
Ответ:
96*(1/(1+3))=24 peanut cookies
96*(3/(1+3))=72 sugar cookies.
Also, he baked 24 peanut cookies, 72 sugar cookies.
Ответ:
a) a = 7.37, b = 15.13, C = 67°
b) 1 triangle
Step-by-step explanation:
a)Two angles and one side are given. That means the triangle is uniquely determined, and the remaining sides can be found from the Law of Sines.
The third angle is ...
C = 180° -A -B = 180° -29° -84° = 67°
Then the Law of Sines tells you ...
a/sin(A) = b/sin(B) = c/sin(C)
a = sin(A)/sin(C)·c = sin(29°)/sin(67°)·14 ≈ 7.37
b = sin(B)/sin(C)·c = sin(84°)/sin(67°)·14 ≈ 15.13
__
b)Ordinarily, when the given angle (B = 30°) is opposite the shorter of the given sides (b = 10 < a = 20), it means there are two possible solutions to the triangle.
However, when the sine of the angle is exactly equal to the ratio of the given sides: sin(30°) = 10/20 = 1/2, the larger angle can only be 90°. That is, the one triangle that can be formed is a right triangle.
The Law of Sines tells you this.
sin(A)/a = sin(B)/b
sin(A) = (a/b)sin(B) . . . . . . multiply by 'a'
A = arcsin(a/b·sin(B)) = arcsin(20/10·sin(π/6)) = arcsin(1)
A = 90°