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s2008m [1.1K]
3 years ago
14

X-3y-7=0 , 3x-3y-15=0 solve this using cross multiplication​

Mathematics
1 answer:
rewona [7]3 years ago
8 0

Answer:

x = 4 , y = -1

Step-by-step explanation:

x - 3y = 7 -- (1)

3x - 3y = 15 -- (2)

Rewriting (1), x = 3y + 7 -- (1)'

Substituting (1)' into (2),

3 ( 3y + 7 ) - 3y = 15

9y + 21 - 3y = 15

6y = -6

y = -1 -- (3)

Substituting (3) into (1),

x - 3 ( - 1 ) = 7

x + 3 = 7

x = 4 -- (4)

According to (3) and (4),

x = 4 , y = -1

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4 years ago
Factor the polynomial t2+8t
miskamm [114]
Two solutions were found :<span> t = 8 t = 0</span>

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "t2"   was replaced by   "t^2". 

Step by step solution :Skip Ad
<span>Step  1  :</span><span>Step  2  :</span>Pulling out like terms :

<span> 2.1 </span>    Pull out like factors :

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<span> 3.1 </span>   A product of several terms equals zero.<span> 

 </span>When a product of two or more terms equals zero, then at least one of the terms must be zero.<span> 

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Solving a Single Variable Equation :

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Solving a Single Variable Equation :

<span> 3.3 </span>     Solve  :    t-8 = 0<span> 

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Two solutions were found :<span> t = 8<span> t = 0</span></span>
4 0
3 years ago
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HIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII68052wassupcan someonetell me whats 1+1 PLZZZZZZZZZZZZZZZZZZZZZZZZZ im
Andrew [12]

Answer:

yooooooo its 2

Step-by-step explanation:

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3 years ago
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