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stepladder [879]
3 years ago
11

(7,-4);

Mathematics
1 answer:
olga_2 [115]3 years ago
8 0

Literally just plug it in

6(7) + 5(-4) - 42 = 0

42 -20 -42 = 0

-20 = 0

Not a solution.

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Is 4 5/12 a terminating or repeating decimal?
Vesnalui [34]

Answer:

repeating

Step-by-step explanation:

5/12 is 0.4166666 on and on forever. so it is repeating.

5 0
3 years ago
X² + y² = 8
ohaa [14]

Answer:

(2,2)~ \text{and}~ (-2,-2)

Step by step explanation:

x^2 +y^2 =8~~~~~~...(i)\\\\x-y=0~~~~~~~~~...(ii)\\\\\text{From (ii):}\\\\x-y = 0 \implies x = y\\\\\text{Substitute x = y  in eq (i):}\\\\~~~~~~y^2 +y^2 =8\\\\\implies 2y^2 = 8\\ \\\implies y^2 = \dfrac 82\\\\\implies y^2 = 4\\\\\implies y = \pm\sqrt 4\\\\\implies y = \pm 2\\\\\text{Substitute y = x  in equation (i):}\\ \\~~~~~~x^2 +x^2 = 8\\ \\\implies 2x^2 = 8\\\\\implies x^2 = \dfrac 82\\\\\implies x^2 = 4\\\\\implies x = \pm\sqrt 4\\\\\implies x = \pm2\\\\

\text{Hence,}~ (x,y) = (\pm2, \pm 2)

3 0
2 years ago
15% of the students in school eat hot lunch. If 60
morpeh [17]

Answer:

400 students

Step-by-step explanation:

So 15 percent is 60 students

make an equation

0.15x=60

X stands for the total amount fo students and multiply that 0.15 becuase we know ti equals 60 and finding X will solve both problems

that’ll give you 400 students

if you check

400*0.15=60

So its correct

7 0
2 years ago
2<br> — x = 6<br> 3<br><br> Any help? Please?
Mama L [17]
X = 9
you multiply both sides by 3 because you have to get rid of it and what you do to one side you do to the other then you divide both sides by 2 to isolate the variable. i hope that makes sense.
4 0
3 years ago
Read 2 more answers
On Friday, there were x students at the baseball game. On Monday, there were half as many students at the game as there were on
Brut [27]

Number of tickets sold on
Friday = x tickets
Monday = (1/2) x
Wednesday = x - 32

8 0
3 years ago
Read 2 more answers
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