2 years ago

Solve for Y 4x – 5y = -20

Mathematics

2 answers:

Minchanka [31]2 years ago

7 0

The answer to you’re question is y = 4 + 4x/5

emmasim [6.3K]2 years ago

4 0

Answer:

y=4

Step-by-step explanation:

I'm a little rusty at this but y=4 should be the correct answer.

Hope this helps!

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mixas84 [53]

2)

2*120 + 2*3.14*40 = 240 + 251.2 = 491.2;

3 0

3 years ago

Find the value of a and b if root3-1/root3+1+ root3+1/root3-1=a+root3 b

Digiron [165]

Answer:

a=4 and b = 0

Step-by-step explanation:

Given : $\dfrac{\sqrt 3 -1}{\sqrt 3+1}+\dfrac{\sqrt 3+1}{\sqrt 3-1}=a+\sqrt 3 b$

To find, The value of a and b

Solution,

Solving LHS of the given equation,

$\dfrac{(\sqrt 3-1)^2+(\sqrt3+1)^2}{(\sqrt 3+1)(\sqrt 3-1)}=a+\sqrt 3 b$

Since,

$(a-b)^2=a^2+b^2-2ab\\\\(a+b)^2=a^2+b^2+2ab\\\\(a-b)(a+b)=a^2+b^2$

So,

$\dfrac{3+1-2\sqrt 3+3+1+2\sqrt 3}{3-1}=a+\sqrt 3 b\\\\4=a+\sqrt 3 b$

$4+0=a+\sqrt 3 b$

On comparing we get :

a = 4 and b = 0

4 0

3 years ago

Help me Line ℓ is perpendicular to line m. Find the value of x and w.

wel

138° + w° = 180° (sum of angle on a straight line)
w° = 180° - 138°
w = 42

19° + x° + w° = 90°
sub. in w=42,
19° + x° + 42° = 90°
x° = 90° - 19° - 42°
x° = 29°
x = 29

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2 years ago

Read 2 more answers

What is 4 2/7 * 2 1/5 A. 9 3/7 B. 9 1/7 C. 8 1/7 D. 8 2/35

Nina [5.8K]

9 3/7 would be your answer

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3 years ago

Find the area of a circle with radius equal to 6. A =

anyanavicka [17]

Answer:

Step-by-step explanation:

hello :

A= πr² r = 6

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3 years ago