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-Dominant- [34]
3 years ago
8

Please help. I will give brainliest to first person that responds.

Mathematics
1 answer:
natulia [17]3 years ago
3 0

Answer:

it is 15.2

Step-by-step explanation:

Obama super smart

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9. 3x + 9y = 18<br> y = x + 2<br> Substitution method
777dan777 [17]

Answer:

x = 0

y = 2

Step-by-step explanation:

3x + 9y = 18 ---------eqn 1

y = x + 2---------eqn 2

Substitute eqn 2 into eqn 1, for the value of y

3x + 9( x + 2) = 18

3x + 9x + 18 = 18

12x + 18 = 18

12x = 18 -18

12x = 0

Divide both sides by 12 , to get the value of x.

12x/ 12 = 0/12

x = 0

Substitute x = 0 into eqn 2

y = x + 2

y = 0 +2

y = 2

Hint: to confirm the values

x = 0

y = 2

Let's take eqn 1 ,

3x + 9y = 18

3(0) + 9(2)

= 0 + 18

= 18

Correct

Let's take eqn 2

y = x + 2

Let's find y

y = 0 + 2

y = 2

Correct too

4 0
3 years ago
Solve for the proportion. x+2/5=6/15
Lelechka [254]

For this case we must solve the following proportion:

\frac {x + 2} {5} = \frac {6} {15}

Multiplying by 5 on both sides of the equation we have:

x + 2 = \frac {6 * 5} {15}\\x + 2 = \frac {30} {15}\\x + 2 = 2

Subtracting 2 from both sides of the equation:

x = 2-2\\x = 0

ANswer:

x = 0

8 0
3 years ago
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A four-sided plane figure has sides measuring 10, 15, 10 and 15. The opposite angles are equal, but there are no right angles. w
Usimov [2.4K]
The correct answer is A- rhombus
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3 years ago
PLEASE ANSWER IN 50 MIN I WILL MARK BRAINLIEST
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Answer:

174lbs

Step-by-step explanation:

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3 years ago
Please help.............
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Answer:

The answer is 4

8 0
2 years ago
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