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Gennadij [26K]
3 years ago
13

PLEASE HELP ASAP :>

Mathematics
2 answers:
Dominik [7]3 years ago
8 0

Answer:

-2 is 100% correct !

Step-by-step explanation:

aleksandrvk [35]3 years ago
6 0

Answer:

-2

Step-by-step explanation:

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A mass weighing 3 lb stretches a spring 3 in. If the mass is pushed upward, contracting the spring a distance of 1 in and then s
Bas_tet [7]

Answer:

Step-by-step explanation:

m=\frac{3}{32}\\ \gamma =0\text{ damping constant.}\\ k=\frac{3}{\frac{1}{4}}=12\\ F(t)=0\\ \text{so equation of motion is }\\ mu''+\gamma u'+ku=F(t)\\ \frac{3u''}{32}+12u=0\\ u''+128u=0\\ \text{and initial conditions are}\\ u(0)=-\frac{1}{12}\\ u'(0)=2\\ u''+128u=0\\ \text{characterstic equation is}\\ r^2+128=0\\ \text{roots are }\\ r=\pm 8\sqrt{2}i\\ \text{therefore general solution is}\\ u(t)=A\cos8\sqrt{2}t+Bsin8\sqrt{2}t\\ \text{using initial conditions we get}\\ A=-\frac{1}{12}\\ B=\frac{\sqrt{2}}{8}\\ \text{therefore solution is }\\ u(t)=-\frac{1}{12}\cos8\sqrt{2}t+\frac{\sqrt{2}}{8}\sin8\sqrt{2}t\\
{hence}\\R=\sqrt{\frac{11}{288}}\\\\\sigma=\pi - \tan^{-1}\frac{1}{\sqrt{2}}\\\\\omega_0=8\sqrt{2}\\T=\frac{4}{4\sqrt{2}}

3 0
3 years ago
What is the area of this figure?
VashaNatasha [74]

Answer:

104cm^2

Step-by-step explanation:

Area of 1st rectangle

given

l=12cm

w=6cm

A =l×w

=12cm×6cm

=72cm^2

Area of 2nd rectangle

given

l=14-6=8cm

w=4cm

A=l×w

=8cm×4cm

=32cm^2

Total area =72cm^2+32cm^2=104cm^2

8 0
3 years ago
Read 2 more answers
Помогите с решением Матриц
vivado [14]

Answer:

я не знаю потому что я не говорю по русски

Step-by-step explanation:

5 0
3 years ago
If T(n)= 3n-1 what is the third term
irina [24]
T(3)=3(3)-1
T(3)=9-1
T(3)=8

answer is 8
8 0
3 years ago
Read 2 more answers
my friend and i made balls of snow all morning. by night fall we had build 13 snowmen. how many balls of snow did we make​
Zigmanuir [339]

Answer:

39

Step-by-step explanation:

113x3=39

4 0
3 years ago
Read 2 more answers
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