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ipn [44]
3 years ago
6

X - y = 3 x + 3y = 9

Mathematics
2 answers:
Ugo [173]3 years ago
7 0
Solve for one of the variables in the first equation (in this case, I will solve for X):
X = Y + 3

Then use that value of X in the second equation to solve for Y:
X + 3Y = 9
(Y + 3) + 3Y = 9
4Y + 3 = 9
4Y = 6
Y = 1.5

Use the value of Y we just found in the X equation we created:
X = Y + 3
X = 1.5 + 3
X = 4.5

Therefore X = 4.5 or 9/2 and Y = 1.5 or 3/2.
Verizon [17]3 years ago
3 0
<span>X - y = 3 is the same as x=3+y </span> 
<span>
3+y+3y = 9 </span> 
<span>
3+4y=9 </span> 
<span>
4y=9-3 
</span>
 <span>4y=6 
</span>
 <span>y=6/4 
</span>
 <span>y=3/2 </span> 
<span>
x-(3/2)=3 </span> 
<span>
x=3+(3/2) </span> 
<span>
x=6/2+3/2 </span> 
<span>

x=9/2</span>
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The top of the John Hancock Building is a rectangle whose length is 60 ft more than the width. The perimeter is 520 feet. What i
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160 ft

Step-by-step explanation:

We have

2(length + width)= perimeter

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let, width =x

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Which ordered pair is a solution to the inequality?<br><br> Help please!!
Murrr4er [49]

Choice A is the answer which is the point (1,-1)

=========================================

How I got this answer:

Plug each point into the inequality. If you get a true statement after simplifying, then that point is in the solution set and therefore a solution. Otherwise, it's not a solution.

-------------

checking choice A

plug in (x,y) = (1,-1)

y - 2x \le -3

-1 - 2(1) \le -3

-3 \le -3

This is true because -3 is equal to itself. So this is the answer.

-------------

checking choice B

plug in (x,y) = (2,4)

y - 2x \le -3

4 - 2(2) \le -3

0 \le -3

This is false because 0 is not to the left of -3, nor is 0 equal to -3. We can cross this off the list.

-------------

checking choice C

plug in (x,y) = (-2,3)

y - 2x \le -3

3 - 2(-2) \le -3

7 \le -3

This is false because 7 is not to the left of -3, nor is 7 equal to -3. We can cross this off the list.

-------------

checking choice D

plug in (x,y) = (3,4)

y - 2x \le -3

4 - 2(3) \le -3

-2 \le -3

This is false because -2 is not to the left of -3, nor is -2 equal to -3. We can cross this off the list.


4 0
3 years ago
8 divided by (7 - 3) x ( 4 + 6)<br> Equals?
gregori [183]

8÷(7-3)x(4+6)

8÷4x10

2x10

<u>20</u>

3 0
3 years ago
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