Answer:
probably 8x6+8x4y2−5x3y3+x2y4−7xy5
Step-by-step explanation:
mathpapa lol idk i jus need points
-100-70+100-30=-100
I included the value of the merchandise that she "purchased", so the owner lost $100 in total value.
Answer:
Let the larger number = y and the smaller number = x.
The largest number is 10 less than twice the smaller number. Remember that less than means subtract the 10 from the other amount while twice means multiply by two. Therefore,
y = 2x - 10
The sum of the two numbers is 38. Remember sum means add the two numbers to get their result. Therefore,
x + y = 38
Since y = 2x - 10, we rewrite the lower equation as:
x + (2x - 10) = 38
Solving:
3x - 10 = 38
3x = 48
x = 16
The lesser number is 16 and the greater number is 2(16) - 10 or 22.
Answer:
<u>Ques 1)</u>
(-2,12)
<u>Ques 2)</u>
The solution is: (4,1)
<u>Ques 3)</u>
The solution is:
(-4,1)
<u>Ques 4)</u>
The solution is: (-3, 3)
<u>Ques 5)</u>
The solution is: (1,-2)
Step-by-step explanation:
Ques 1)
We have to solve the following system of equation using elimination method.
{5x+y=2
4x+y=4
we will subtract equation (2) from first to obtain:
5x-4x=2-4
x= -2
Now on putting the value of x in first equation we obtain:
5×(-2)+y=2
-10+y=2
y=2+10
y=12
Hence, the solution is:
(-2,12)
Ques 2)
Now again we have to solve using linear combination method.
{2d−e=7
d+e=5
we will add both the equations to get:
2d+d=12
3d=12
d=4
and on putting the value of d in second equation we obtain:
4+e=5
e=5-4
e=1
Hence,
C. The solution is (4, 1).
Ques 3)
5x−y=−21
x+y=−3
we will add both the equation to obtain:
5x+x=-21-3
6x = -24
x= -4
and on putting the value of x in equation (2) we get:
-4+y = -3
y= -3+4
y=1
Hence, the solution is:
(-4,1)
Ques 4)
−3x+9y=36
4x+12y=24
we will divide first equation on both side by 3 and second equation on both side by 4 to obtain the system as:
-x+3y=12
x+3y=6
on adding both the equations we get:
3y+3y=12+6
i.e. 6y=18
i.e. y=3
Hence on putting the value of y in one of the equation we obtain:
x= -3
Hence, the solution is:
(-3,3)
Ques 5)
7/2x−1/2y=9/2
3x−y=5
on multiplying both side of the equation by 2 we obtain:
7x-y=9
Now on subtracting second equation from this transformed equation we obtain:
7x-3x=9-5
4x=4
x=1
Hence on putting the value of x in one of the equations we obtain the value of y as:
y= -2
Hence, the solution is:
(1, -2)
