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Lemur [1.5K]
3 years ago
8

Two-variable linear equations 2x – 5y = 20

Mathematics
1 answer:
Lynna [10]3 years ago
7 0
Y= (2x-20)/ 5 then you replace y so with a simple calculation u get x than u replace x with it value to get y as simple as that 
You might be interested in
Are the ratios 25/45 and 15/27 proportional? show your work, explain
e-lub [12.9K]

Answer:

They are proportional

Step-by-step explanation:

Cross multiply, if the results are the same, they are proportional. If not, well then they're not proportional.

25 × 27 = 675

45 × 15 = 675

They have the same result

They are proportional

6 0
3 years ago
What is the factored form of x^2-x-2? ​
ipn [44]

Answer:

(x+1)(x-2)

Step-by-step explanation:

You can factor this by grouping.

x^2-x-2

\left(x^2+x\right)+\left(-2x-2\right)

x\left(x+1\right)-2\left(x+1\right)

\left(x+1\right)\left(x-2\right)

8 0
3 years ago
Please help I will reward brainly
aalyn [17]
P(heads, and even and blue) = 1/2 *3/6 *1/4=1/2*1/2*1/4=1/16

P(heads, and 5, and green) = 1/2*1/6*1/4=1/48

P((heads or tail), and odd, and red)= (1/2+1/2)*3/6*1/4=1*1/2*1/4 = 1/8

 P((heads or tail), and 3, and yellow)= (1/2+1/2)*1/6*1/4=1*1/6*1/4=1/24

P(tails, and prime, and not green) = 1/2 *3/6*3/4= 1/2*1/2*3/4=3/16
(Prime numbers here are 2,3 and 5)
7 0
4 years ago
An electric company has to track on-time payments and late payments for each customer monthly. It is impossible for a customer t
OLga [1]

Answer:

The  probability that a customer pays late each month is    P(B)  =  0.27

Step-by-step explanation:

Let     P( A ) be the probability that the customer pays on time and the value is  0.55

Let  P( B )  be the  probability that a customer pays late each month

So

  The probability that a customer pays late or on-time each month  is  P(A u B) and  the value is  0.82

The probability that a customer pays on-time and late each month is  P(A n B) and  the value is  zero ( 0 ) given that it is impossible

   Now The probability that a customer pays late or on-time each month  is mathematically represented as

      P(A u B)  =  P(A) +  P(B)  -   P(A n B)

=>     0.82  =  0.55 + P( B ) -   0

=>    P(B)  =  0.27

8 0
3 years ago
Can someone please explain this!<br> (-5x^2+3)-(-x^3+9x^2+9)
Anastasy [175]

9514 1404 393

Answer:

  x^3 -14x^2 -6

Step-by-step explanation:

Your expression is the difference of two polynomials. The parentheses can be removed by using the distributive property. The minus sign outside the second set of parentheses applies to each term inside parentheses.

  -5x^2 +3 +x^3 -9x^2 -9

Now, you can group like terms. In "standard form", the degrees of the terms decrease from left to right.

  x^3 +(-5x^2 -9x^2) +(3 -9)

And combine like terms.

  x^3 -14x^2 -6 . . . . . simplified form of the given expression

5 0
3 years ago
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