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andreev551 [17]
3 years ago
5

Write the solution as x, y

Mathematics
1 answer:
Crank3 years ago
7 0
1) −3x+y=−13
4x+5y=1
−3x+y=−13( this is y)
Now it's time for you to add
−3x+y+3x=−13+3x
Next you will substitute (3x-13) for y in the equation 4x+5y=1
4x+5y=1
4x+5(3x−13)=1
19x−65=1 <<<(for this part you start to simplify)
19x−65+65=1+65
19x=66
Then you get
19x/19= 66/19
x=66/19
Now it's time for you to substitute 66/19

y=3x−13
y=3(66/19)−13
Then for y you get
y=−49/19
So the answer for number one is
x=66/19 y=49/19.

2)x−y=−4
x−y=1
First things first add y to both sides
x−y+y=−4+y
Your result is:
x=y−4
It's time to substitute
x−y=1
y−4−y=1
−4=1
What you need to do now is add
−4+4=1+4
and you get 0=5
For this problem you have no solutions.

Hope this helps
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You have purchased a property that you intend to rent out to people. The mortgage payment is $765/month and the property taxes a
Delicious77 [7]
Monthly mortgage payment multiplied by 12 months in a year. 
765*12=9,180.
Add yearly mortgage plus property taxes:
9,180+4,056=13,236
Divide the total by 12 months in a year. 
13,236/12=1,103
You should charge $1,103 a month to come out even. 

You can also take the property taxes and divide them by 12 (months in a year)  4056/12=338. Then add the monthly mortgage ($765) 
 765+338= $1,103.

Hope this helps :)
7 0
3 years ago
In △ABC, a=31, b=22, and c=18. Identify m∠A rounded to the nearest degree. HELP ME PLEASE!!
4vir4ik [10]

Answer:

The measure of angle A is 101\°

Step-by-step explanation:

we know that

Applying the law of cosines

a^{2} =b^{2}+c^{2}-2(b)(c)cos(A)

substitute the values and solve for cos(A)

31^{2} =22^{2}+18^{2}-2(22)(18)cos(A)

cos(A)=[22^{2}+18^{2}-31^{2}]/(2(22)(18))\\ \\cos(A)=-0.193182\\ \\A=arccos(-0.193182)=101\°

3 0
3 years ago
Is a parallelogram a square. <br><br> JUST SAY YES OR NO, SKIP THE EXPLANATION
allochka39001 [22]

Answer:

no

You said skip the explanation, so ok

6 0
3 years ago
Angles A and B are supplementary. Angle A has a measure of 80 degrees. What is the measure of angle B?
Aleonysh [2.5K]
Supplementary angles, when added, equal 180 degrees

so < A + < B = 180...and if < A = 80
     80 + < B = 180
     < B = 180 - 80
    < B = 100 <==
4 0
3 years ago
Read 2 more answers
(02.06)
kari74 [83]
The measurements of an angle X is 80
6 0
2 years ago
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