2 years ago

Help? mathhhhhhhhhhhhhhhhhhhhhhhhhhhh

Mathematics

1 answer:

Vanyuwa [196]2 years ago

4 0

Answer:

a + 20 = 7*12 (multiplied both sides by 12)

a + 20 = 84 (calculated 7*12)

a = 84 - 20 (subtracted 20 on both sides)

a = 64 (calculated 84-20)

You might be interested in

Consider the initial value problem:

Inessa [10]

Answer:

$\left \{ {{u'=v} \atop {v'=5v-6u-5\sin(2t)}} \right. \\u(0)=-5;u'(0)=2$

Step-by-step explanation:

The given initial value problem is;

$y''-5y'+6y=-5\sin(2t)---(1)\\y(0)=-5,y'(0)=2$

Let

$u(t)=y(t)----(2)\\v(t)=y'(t)----(3)$

Differentiating both sides of equation (1) with respect to $t$ , we obtain:

$u'(t)=y'(t)---(4)\\ \\\implies u'(t)=v(t)---(5)$

Differentiating both sides of equation (2) with respect to $t$ gives:

$v'(t)=y''(t)----(6)$

From equation (1),

$y''=5y'-6y-5\sin(2t)\\y''=5v(t)-6u(t)-5\sin(2t)\\\implies v'(t)=5v(t)-6u(t)-5\sin(2t)----(7)$

Putting t=0 into equation (2) yields

$u(0)=y(0)\\\implies u(0)=-5$

Also putting t=0 into equation (3)

$u'(0)=y'(0)\\u'(0)=2$

The system of first order equations is:

$\left \{ {{u'=v} \atop {v'=5v-6u-5\sin(2t)}} \right. \\u(0)=-5;u'(0)=2$

3 0

3 years ago

Can you help me real quick guys?

Allisa [31]

Answer:

hope it's helpful ❤❤

THANK YOU

8 0

2 years ago

tara is inviting 6 freinds to a party if each freind will get 5 cookies and each box has 12 cookies how many boxes does tara nee

bonufazy [111]

Answer:

3 boxes

Step-by-step explanation:

7 0

2 years ago

How to sketch the solutions to each. systems of inequalities

zloy xaker [14]

It depends what inequality you have

4 0

2 years ago

What is 8.7 + w = 5.1

Vanyuwa [196]

8.7+w=5.1
W=-3.6
Have a great day and stay in school

5 0

2 years ago

Read 2 more answers