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dusya [7]
3 years ago
10

Solve this step by step and explain your answer

Mathematics
2 answers:
Ostrovityanka [42]3 years ago
5 0
Answer:
1. 6x+7y=17
X= -7/ 6y + 17/6
2. 6x+5y=7
X= -5/6 y + 7/6

Hope this is correct if so brainlist please.
WITCHER [35]3 years ago
3 0

Answer:

(-3,5)

Step-by-step explanation:

6x+7y=17

-6x+5y=7

2y=10

y=5

6x+5(5)=7

6x+25=7

6x=7-25

6x=-18

x=-3

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If y>0, which of these values of x is NOT in the domain of this equation? y=x2+7x
alisha [4.7K]

Answer:

\boxed{\sf \ \ \  [-7,0] \ \ \ }

Step-by-step explanation:

Hello

y=x^2+7x=x(x+7) >0\\ x>0 \ and \ x+7 >0 \ \ or \ \ x

So values of x which is not in this domain is

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hope this helps

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4 years ago
Which expression correctly represents eight times the difference of 4 and a number
expeople1 [14]

Answer:

The expression for two times the difference of 4 and a number  is

8(4-d)

Step-by-step explanation:

To Find:

Write an expression for Eight times the difference of 4 and a number.

Solution:

Let the Unknown number be 'd'

Difference of 4 and d                        =      ( 4 - d )

So One Time Difference of 4 and d =  1× ( 4 - d )

∴   Two Times Difference of 4 and d = 2× ( 4 - d )

∴   Eight Times Difference of 4 and d = 8× ( 4 - d )

The expression for Eight times the difference of 4 and d. will be

8(4-d)

The expression for Eight times the difference of 4 and a number  is

8(4-d)

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Which rule represents the table's values?
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