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natali 33 [55]
3 years ago
10

X+y=1 x+3y=9 Solve plzzzzzzzzzzzzzzzzzzzz

Mathematics
1 answer:
katovenus [111]3 years ago
8 0

Answer:

x = - 3

y = 4

Step-by-step explanation:

x + y = 1 | (-3)

x + 3y = 9

- 3x - 3y = - 3

   x + 3y = 9

_____________

- 3x + x = 9 - 3

- 2x = 6

2x = - 6

x = - 3

- 3 + y = 1

y = 1 + 3

y = 4

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directrix = x = -\frac{95}{16}

GRAPH :

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3 0
3 years ago
John took all his money from his savings account. He spent $88 on a radio and 1/4 of what was left on presents for his friends.
gayaneshka [121]

Answer:

$968

Step-by-step explanation:

x= the money John originally had in his savings account

The statement says that John spent $88 on a radio and 1/4 of what was left on presents for his friends. This means that the remaining money is 3/4 of the total amount minus the money spent on the radio:

3/4(x-88)

Then, it says that of the money remaining, John put 4/11 into a checking account and the last remaining $420 was left to charity. Since, he spent 4/11 of the remining 3/4(x-88), the remaining is 7/11 of that and that remaining is equal to $420 that was the money left at the end:

7/11(3/4(x-88))= 420

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According to this, the money that John originally had in his savings account was $968.

He spent $88 on a radio: 968-88= 880

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Of the money remaining, John put 4/11 into a checking account: 660*(4/11)=240

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3 years ago
if someone works 37.5 hours one week if she woked 5 days how many hours did she work on average per day please help me
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7 in a half hrs everyday for 5 days equal 37.5 hrs
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