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Readme [11.4K]
3 years ago
5

Can someone help me and tell me what I got wrong

Mathematics
2 answers:
aliina [53]3 years ago
6 0

I'm not sure what you did at first, but here's how I solved it:

7(3+3)-9

7(6)-9

42-9

=33

i can't see your original answer, so i can't tell you specifically what went wrong, but i hope that helps!

ira [324]3 years ago
4 0

Answer: 33

Step-by-step explanation:

f(a)=7(a+3)-9

f(3)=7(3+3)-9

f(3)=7(6)-9

f(3)=42-9

f(3)=33

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Es urgente ¡¡¡ si la MH de a y 4 es 6 y la MH de 8 y b es 12 calcula la MH de a y b
TiliK225 [7]

Answer:

Sabemos que:

MH(x, y) = \frac{2xy}{x+y}

y tenemos que:

MH (a,4) = \frac{2*a*4}{a+4} = \frac{8*a}{a+4} = 6

Con esto podemos encontrar el valor de a:

8*a/(a+ 4) = 6

8*a = 6*(a + 4) = 6*a + 24

8a - 6a = 24

2a = 24

a = 24/2 = 12.

Tambien sabemos que:

MH(8,b) = \frac{2*8*b}{8+b} =\frac{16*b}{8+b} = 12

Y de ahí podemos despejar b:

(16*b)/(b + 8) = 12

16*b = 12*(b + 8) = 12b + 96

16b - 12b = 96

4b = 96

b = 96/4 = 24

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7 0
3 years ago
Please help me with this:(
dolphi86 [110]

Answer:

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Step-by-step explanation:

We will apply the Cosine law in the given triangle XYZ,

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y² = x² + z² - 2xzCosY

(55)² = (90)² + (50)² - 2(90)(50)cosY

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cosY = \frac{7575}{9000}

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Y = \text{cos}^{-1}(0.84167)

Y = 32.68 ≈ 32.7°

Therefore, measure of angle Y = 32.7°

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Btw download photomath on your phone it helps alot

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