3 years ago

Solve by using substitution 8x - 10y = 4 x = 8

Mathematics

1 answer:

rewona [7]3 years ago

4 0

Answer:

y= 6

Step-by-step explanation:

First you substitute in the 8 for x. you then multiply 8 times 8 which equals 64. you subtract 64 from 4 and 64, since it would be the opposite of addition. you would then take the -10y=-60, and you would divide by negative 10 to get y by itself. since negative 60 divided by negative 10 is a positive 6, your answer would be y equals 6.

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3 years ago

Simplify (4i)(–5i)(6i) –120 –120i(incorrect) 120i 120

professor190 [17]

Answer:

120i

Step-by-step explanation:

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3 years ago

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4 + 6x + 5 = 7x Could someone help me? Thanks :) And could you also show how u did it

matrenka [14]

Answer:

x=9

Step-by-step explanation:

combine like terms

$4+6x+5=7x$

4+5=9

9+6x=7x

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6x-6x=0

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4 0

3 years ago

Help me to solve this please

scZoUnD [109]

Answer:

-4/9

Step-by-step explanation:

We first calculate the first bracket.

[2/3-(-4/9)]

= (2/3+4/9) (we cancel out the negatives)

= (6/9+4/9) (common denominator)

= 10/9

Then we convert -2 1/2 into an improper fraction.

-2 1/2

= -5/2

Finally we calculate the division by swapping the numerator and denominator of -5/2.

10/9 / -5/2

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3 0

3 years ago