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11Alexandr11 [23.1K]
3 years ago
8

Which of the following ordered pairs is a solution of 3x+2y=-19

Mathematics
1 answer:
34kurt3 years ago
8 0
We need the ordered pairs to choose an answer, but if you want to do it yourself you plug in the x and y values (x,y) and test to see if the equation is true, and equals -19.
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How do you simplify(n!)^2/(n+1)!(n-1)!
ANTONII [103]
We haven n! = (n-1)! x n and (n+1)! = n! x (n + 1);
Then, (n!)^2 = n! x n! = n! x (n-1)! x n;
And (n+1)!(n-1)! = n! x (n + 1) x (n-1)!;
Finally, [n! x (n-1)! x n] / [n! x (n + 1) x (n-1)!] = (n+1)/n;
5 0
3 years ago
Angela tried to solve an equation step by step. \begin{aligned} \dfrac34+m&=\dfrac54\\\\ \dfrac34+m-\dfrac34&=\dfrac54+\
Liono4ka [1.6K]

Answer:

The mistake she made was ; She didn't change the sign when subtracting -3/4 from both sides

She wrote 5/4+3/4 instead of 5/4-3/4

Step-by-step explanation:

Correct solution:

\frac{3}{4}  + m =   \frac{5}{4}

Subtract-3/4 from both sides

\frac{3}{4}  -  \frac{3}{4}  + m =  \frac{5}{4}  -  \frac{3}{4}

Simplify

m =  \frac{5}{4}  -  \frac{3}{4}  \\ m =  \frac{1}{2}

7 0
3 years ago
Ummm help ig please................
AlexFokin [52]

Answer:

Cost of 500 g of standard pack = € 7.50

Cost of 1 g of standard pack = 7.50/500

Cost of 100 g of standard pack = 7.50/500 ×100

= 7.50/5

= € 1.50

Hope it helps uh dear

8 0
3 years ago
Ahhhh someone please help, 40 points!
valina [46]

Answer:

ok 2hats the qeustion?

6 0
3 years ago
Read 2 more answers
Can someone help me plzzz multiply 46 bye 78
lorasvet [3.4K]
The answer is 3588 if you multiply 46 x 78 you get 3588
3 0
3 years ago
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