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3 years ago

PLS HELP ME ILL MARK BRAINLIST!!

Mathematics

1 answer:

WITCHER [35]3 years ago

8 0

Answer:

Step-by-step explanation:

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10. Write and solve an equation to find the measure of

lbvjy [14]

3x+54=180
180-54
126/3
=42 degrees.
42 degrees is you answer :)

3 0

3 years ago

Find the solution r(t)r(t) of the differential equation with the given initial condition: r′(t)=⟨sin9t,sin6t,9t⟩,r(0)=⟨4,6,3⟩

klemol [59]

$\mathbf r'(t)=\langle\sin9t,\sin6t,9t\rangle$

$\mathbf r(t)=\displaystyle\int\mathbf r'(t)\,\mathrm dt$

$\mathbf r(t)=\left\langle\displaystyle\int\sin9t\,\mathrm dt,\int\sin6t\,\mathrm dt,\int9t\,\mathrm dt\right\rangle$

$\displaystyle\int\sin9t\,\mathrm dt=\frac19\cos9t+C_1$

$\displaystyle\int\sin6t\,\mathrm dt=\frac16\cos6t+C_2$

$\displaystyle\int9t\,\mathrm dt=\frac92t^2+C_3$

With the initial condition $\mathbf r(0)=\langle4,6,3\rangle$ , we find

$\dfrac19\cos0+C_1=4\implies C_1=\dfrac{35}9$

$\dfrac16\cos0+C_2=6\implies C_2=\dfrac{35}6$

$\dfrac92\cdot0^2+C_3=3\implies C_3=3$

So the particular solution to the IVP is

$\mathbf r(t)=\left\langle\dfrac19\cos9t+\dfrac{35}9,\dfrac16\cos6t+\dfrac{35}6,\dfrac92t^2+3\right\rangle$

4 0

3 years ago

If (3a + 3b + 1) (3a + 3b - 1) = 80, then a + b =

seropon [69]

Answer:

a+b = 4 $\sqrt{3}$

Step-by-step explanation:

3(a + b)^2 = 81

(a + b)^2 = 27

a + b = sq rt 27

a + b = $\sqrt{9}$ · $\sqrt{3}$

a + b = 3 $\sqrt{3}$

8 0

3 years ago

Whoever answers I’ll mark brainliest

Andre45 [30]

Answer:

x is 60⁰ because 180 - 40 is 120 divide it by 2 because the bottem angles are equal and u get 60

5 0

3 years ago

I need the answer to 1+1 please

ycow [4]

Answer:

Step-by-step explanation:

8 0

3 years ago

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