All categories

3 years ago

Anyone help find this out for 20 points? appreciated

Mathematics

1 answer:

shusha [124]3 years ago

6 0

Answer:

Unknown weight is 11.5kg.

Step-by-step explanation:

Square weight is 4kg. 4×5 =20.

Round weight is 2.5kg. 2×4+2×2.5=13.

Left pan is 4+3×2.5=4+7.5=11.5.

You might be interested in

If 6x^4+8x^3-5x^2+ax+b is completely divisible by 2x^2-5 then find the value of a and b.

mixas84 [53]

Answer:

The value of $a = -20$

The value of $b=-25$

Step-by-step explanation:

Let

$p(x)=6x^4+8x^3-5x^2+ax+b$

and

$q(x)=2x^2-5$

As $q(x)$ is exactly divisible, so, the remainder is 0.

∴ $p(x)=q(x).g(x)+r(x)$

$6x^4 + 8x^3 - 5x^2 + ax + b = (\sqrt{2} x - \sqrt{5})(\sqrt{2} x + \sqrt{5}) g(x)$

As the R.H.S becomes 0 when $x = \sqrt{\frac{5}{2} }$ and $x = -\sqrt{\frac{5}{2} }$ .

And

by substituting $x = \sqrt{\frac{5}{2} }$

$6(\sqrt{\frac{5}{2} } )^4 + 8(\sqrt{\frac{5}{2} } )^3 - 5(\sqrt{\frac{5}{2} } )^2 + a(\sqrt{\frac{5}{2} } ) + b = 0$

$25 + 20( \frac{\sqrt{5}}{\sqrt{2}} ) + a( \frac{\sqrt{5}}{\sqrt{2}}) +b =0...[A]$

by substituting $x = -\sqrt{\frac{5}{2} }$

$25 - 20( \frac{\sqrt{5}}{\sqrt{2}} ) - a( \frac{\sqrt{5}}{\sqrt{2}}) +b =0.....[B]$

Adding Equation [A] and equation [B]

$50 +2b =0$

$b=-25$

Subtracting Equation [A] and equation [B]

$40(\sqrt{\frac{5}{2} } ) + 2a(\sqrt{\frac{5}{2} } ) =0$

$a = -20$

Therefore,

The value of $a = -20$

The value of $b=-25$

Keywords: equation, solution

Learn more about equation solution from brainly.com/question/12687078

#learnwithBrainly

3 0

3 years ago

1. Which regions contain more than 3 million males

densk [106]

Answer:

china has 713 million males

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Brenna charges $15. $30, $45, and $60 for babysitting 1, 2, 3.

Nataliya [291]

Answer:

Its proportional

Step-by-step explanation:

15×1 hour is 15

15×2 hours is 30 and so on

3 0

4 years ago

Read 2 more answers

(NEED HELP WITH NUMBER 1!!!)

alexandr1967 [171]

Answer:

35 ia the answer sorry if im wrong

7 0

3 years ago

Find the exact value of tan A in simplest radical form.

matrenka [14]

Answer:

I think the answer is 13 im not positive but i think it's 13

Step-by-step explanation:

i hope this helps you :)

7 0

3 years ago

Read 2 more answers