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2 years ago

D%20%2B%20xy%20%2B%202%20%7By%7D%5E%7B2%7D%20%3D%204" id="TexFormula1" title="x - 3y = 5a \: \: and \: \: {x}^{2} + xy + 2 {y}^{2} = 4" alt="x - 3y = 5a \: \: and \: \: {x}^{2} + xy + 2 {y}^{2} = 4" align="absmiddle" class="latex-formula">

Mathematics

1 answer:

Dovator [93]2 years ago

3 0

Answer:

look down below the answers

Step-by-step explanation:

its 8

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Can you guys check my work pls?

alex41 [277]

Hey number 8. Be super careful, less than always look at that it should be 5n-3

3 0

3 years ago

Find the simple<br> interest on sh 25000<br> borrowed at the rate<br> of 1% for 3/4yrs.

True [87]

Here the word "borrowed" is taken as Principal, given rate is 1% and time taken is 3/4 yrs.

so by using formula,

I = P*T*R / 100

= 25000*3/4*1 / 100

= 187.5

So the answer must be 187.5.

7 0

3 years ago

What is the slope of the line y= 1/2x + 1?

myrzilka [38]

The slope is 1/2! Right in the problem!

I hope this helped! Mark me Brainliest! :) -Raven❤️

6 0

3 years ago

Read 2 more answers

Factorize 2a^2+7a-15

loris [4]

$\huge\bf \pink {\underline{Solution :-}}$

$2 {a}^{2} + 7a - 15$

$= 2 {a}^{2} + 10a - 3a - 15$

$= 2a(a + 5) - 3(a + 5)$

$= (a + 5)(2a - 3)$

$\sf \red{Hence, Answer \: is \: (a + 5)(2a - 3).}$

$\\$

$\bf \purple{ \underline{ Important \: Formulas \: for \: Factorization :-}}$

$• \: {a}^{2} + 2ab + {b}^{2} = {(a + b)}^{2}$

$• \: (a + b)(a - b) = {a}^{2} - {b}^{2}$

$• \: {a}^{2} - 2 ab + {b}^{2} = {(a - b)}^{2}$

$• \: {a}^{3} + 3 {a}^{2} b + 3a {b}^{2} + {b}^{3} = {(a + b)}^{3}$

$• \: {a}^{3} - 3 {a}^{2} b + 3a {b}^{2} - {b}^{3} = {(a - b)}^{3}$

$• \: {(a + b)}^{2} + {(a - b)}^{2} = 2( {a}^{2} + {b}^{2} )$

$• \: {(a + b)}^{2} - {(a - b)}^{2} = 4ab$

$• \: (a + b)( {a}^{2} -ab + {b}^{2} ) = {a}^{3} + {b}^{3}$

$• \: (a - b)( {a}^{2} + ab + {b}^{2} ) = {a}^{3} - {b}^{3}$

$• \: {( \frac{a + b}{2} )}^{2} - ( {\frac{a - b}{2} } )^{2} = ab$

5 0

3 years ago

Read 2 more answers

You and your friend are selling magazine subscriptions. You sell 8 fewer magazine subscriptions than your friend. Together you s

Xelga [282]

Answer:

b. you sold 17

c. your friend sold 25

Step-by-step explanation:

you=y your friend=x

y=x-8

42=x +y

42=x+(x-8)

42=x+x-8

42=2x-8

50=2x

25=x

Use x to solve for y...

y=25-8

y=17

3 0

3 years ago