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puteri [66]
3 years ago
11

I really need your help

Mathematics
2 answers:
Tatiana [17]3 years ago
7 0

Answer:

the signs will be negative, because one of the mixed numbers is a negative.

2 2/5=12/5

12/5×-1/4= -12/20 or (simplified) -3/5

borishaifa [10]3 years ago
3 0
Okay I can’t see the pic…
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Which expression is equivalent to (5•3)-4
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11

Step-by-step explanation:

(5*3)=15=15-4

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Which distance measurement is the most precise?
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C- 29.25

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Yakvenalex [24]
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3 years ago
Two sides of a triangle are 8 m and 9 m in length and the angle between them is increasing at a rate of 0.06 rad/s. Find the rat
Lelechka [254]
<h2>Rate at which area is increasing is 1.08 m²/s.</h2>

Step-by-step explanation:

Area of triangle is with side a and b and angle C between them is given by

                             A = 0.5 ab SinC

Here we need to find how area changes with  a and b fixed and C is changing,

                       \frac{dA}{dt}=\frac{d}{dt}\left (0.5 absinC\right )\\\\\frac{dA}{dt}=0.5ab\frac{d}{dt}\left (sinC\right )\\\\\frac{dA}{dt}=0.5abcosC\frac{dC}{dt}

We have

                 a = 8 m

                 b = 9 m

                 C=\frac{\pi}{3}rad\\\\\frac{dC}{dt}=0.06rad/s

Substituting

                 \frac{dA}{dt}=0.5\times 8\times 9\times cos\left ( \frac{\pi}{3}\right )\times 0.06\\\\\frac{dA}{dt}=1.08m^2/s

Rate at which area is increasing is 1.08 m²/s.

4 0
3 years ago
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