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inessss [21]
3 years ago
11

Y = -4/3x − 1 y = 1/3x + 4

Mathematics
1 answer:
Tom [10]3 years ago
7 0

Answer:

x = -3, y =3

Step-by-step explanation:

y = -4/3x - 1

y = 1/3x + 4 -------> 4y = 4/3x + 16

Adding the first equation and the new second equation together:

5y = 15 ------> y = 3

Plug y = 3 into one of the original equations:

3 = 1/3x + 4

-1 = 1/3x

x = -3

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X^2+x-2/1-x^2 ÷ 2x^2-6x-20/x^2-4x-5
ad-work [718]
<span>X^2+x-2/1-x^2 ÷ 2x^2-6x-20/x^2-4x-5

   (x + 2)(x - 1)           (x - 5)(x + 1)
= ------------------- *  ---------------------
   (1 + x)(1- x)           2(x + 2)(x - 5)

</span>    (x - 1)        
= ----------
   2(1- x)    

    - (1 - x)        
= -------------
     2(1 - x)    

= -1/2

answer
-1/2 
   
7 0
3 years ago
A day? 6. If 18 pumps can raise 2150 tonnes of water in 50 days, working 8 hours a day, how much water will be raised in 60 days
Butoxors [25]
Given, 18 pumps----2170 tonnes----10*7 hrs.
So, 16 pumps-------2170 tonnes----10*7*18/16 hrs.
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So, no. of days req.= 63/9 = 7 days
5 0
3 years ago
Divide, and then round the answer to two decimal places:<br><br> 0.6256108÷0.527
Ne4ueva [31]

Answer:

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8 0
3 years ago
Angles A and B are complementary. If mA is 13°, what is the measure of B? A. 167° B. 347° C. 13° D. 77°
Marta_Voda [28]

Answer:

D

Step-by-step explanation:

complementary sums until 90 degrees

 90-13=77

7 0
3 years ago
N is a rational number.m is an irrational number.n2 cannot be an irrational number? why or why not
Korolek [52]

If n is rational, it means that

n\in\mathbb{Q}\Rightarrow n=\frac{p}{q},\quad p\in\mathbb{Z},\quad q\in\mathbb{Z}^*

Therefore when we do n² we can write it as

n^2=\frac{p^2}{q^2},\quad p\in\mathbb{Z},\quad q\in\mathbb{Z}^*

Remember that the product of two integer numbers is also an integer, therefore we can guarantee that

p^2\in\mathbb{Z}\text{ and }q^2\in\mathbb{Z}^*

Then we can confirm that n² is the quotient of two integers and the denominator is not zero, therefore, n² is always rational, it cannot be an irrational number

8 0
1 year ago
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