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2 years ago

13

Ada has y blue note book and w red notebook .she combined them and was able to see half of the items. how many items did Ada sel

l?

1 answer:

maria [59]2 years ago

5 0

Answer:

She sold 1 item and remains with 1 item

Step-by-step explanation:

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Factorize 2a^2+7a-15

loris [4]

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

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

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

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

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

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

$\\$

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

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

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

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

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

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

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

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

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

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

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

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3 years ago

Read 2 more answers

Simplify -3 to the exponent of 4

WITCHER [35]

<h2><u>Answer</u>:</h2>

81

<h2><u>Step-by-step explanation</u>:</h2>

$( - 3)^{4} \\ \\ - 3 \times - 3 \times - 3 \times - 3 \\ \\ 9 \times 9 \\ \\ 81$

Hence answer is 81.

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3 years ago

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Ksivusya [100]

C. there are at least two different ways in which participants are treated

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3 years ago

Choose all that give the correct solution for the system of equations.

vlabodo [156]

C because its true and its 6x+4-2 which gets c

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3 years ago

Please only legit answers! and no links!

lesya [120]

Answer:

A) 8 38/44

Step-by-step explanation:

Find Least Common Multiple

3 2/4 + 5 4/11

= 3 22/44 + 5 16/44

= 8 38/44

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2 years ago