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Alex73 [517]
3 years ago
15

Since i didn’t get an answer last time i’m asking again. answer parts A and B.

Mathematics
2 answers:
tester [92]3 years ago
7 0

Answer: X=0 Y=2 (equation has one solution)

Step-by-step explanation: starting with the second equation (y+2x=2) use transposition (or using the inverse operation) to move “2x” do the other side of the equation, this gives you y=-2+2

Now that you have an equation for Y plug it into the first equation (2y-6x=4) it’ll look like this: 2(-2x+2)-6x=4

Use distributive property: -4x+4-6x=4

Combine like terms: -10x+4=4

Use transposition again to move the “4” to the other side: -10x=0

Divide to get “x” by itself: x=0

NOW plug in the value of X into the equation you got for Y (y=-2x+2) it’ll look like this: y=-2(0)+2

Multiply 2 and 0: y=2

Zolol [24]3 years ago
3 0
A is x=1/3y + -2/3 for top one and x=-1/2y+1 for the bottom one
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the larger of two numbers is 12 more than the smaller number.if the sum of the two numbers is 74,find the two numbers
jek_recluse [69]
X = larger number, y = smaller number

x = y + 12
x + y = 74

y + 12 + y = 74
2y + 12 = 74
2y = 74 - 12
2y = 62
y = 62/2
y = 31

x = y + 12
x = 31 + 12
x = 43

so ur 2 numbers are : 43 and 31
8 0
3 years ago
Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth
navik [9.2K]

The answer is the option d, which is: d) \frac{-77+21i}{130}

The explanation for this problem is shown below:

1. Smplify the denominator and rewrite the numerator in this form:

\frac{7i}{7-2i-4-9i} \\\frac{7i}{3-11i}

2. Multiply the denominator and the numerator by the conjugated (3+11i) and simplify the expression, as following:

\frac{7i(3+11i)}{(3-11i)(3+11i)} \\ \frac{21i+77i^{2}}{121+9}  \\ \frac{-77+21i}{130}

3. As you can see, you obtain the expression shown in the option mentioned above.

3 0
3 years ago
How to answer <br> 100x^2+60x+9
iVinArrow [24]

Answer:

Step-by-step explanation:

Rewrite

100

x

2

100

x

2

as

(

10

x

)

2

(

10

x

)

2

.

(

10

x

)

2

+

60

x

+

9

(

10

x

)

2

+

60

x

+

9

Rewrite

9

9

as

3

2

3

2

.

(

10

x

)

2

+

60

x

+

3

2

(

10

x

)

2

+

60

x

+

3

2

Check the middle term by multiplying

2

a

b

2

a

b

and compare this result with the middle term in the original expression.

2

a

b

=

2

⋅

(

10

x

)

⋅

3

2

a

b

=

2

⋅

(

10

x

)

⋅

3

Simplify.

2

a

b

=

60

x

2

a

b

=

60

x

Factor using the perfect square trinomial rule

a

2

+

2

a

b

+

b

2

=

(

a

+

b

)

2

a

2

+

2

a

b

+

b

2

=

(

a

+

b

)

2

, where

a

=

10

x

a

=

10

x

and

b

=

3

b

=

3

.

(

10

x

+

3

)

2

3 0
2 years ago
How can I find the area and perimeter of the circle? pls help
strojnjashka [21]
The perimeter of the circle is also known as the circumference that said figure out what the diameter is and multiply that by pi (3.14) 
8 0
3 years ago
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Translate the sentence into an equation: <br> the sum of a number divided by 7 and 9 equals 3
ludmilkaskok [199]
X/7 + 9 = 3
a number: x
a number divided by 7: x/7
sum of number divided by 7 and 9: x/7 + 9 (and means plus)
equals 3: x/7 + 9 = 3
3 0
3 years ago
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