The answer is D............
<span>1)
11x+5y=20
2x+5y=-25
multiply the second equation by - 1 and add the result with the first equation:
11x + 5y = 20
- 2x - 5y = 25
-------------------
9x = 45
=> x = 45 / 9
=> x = 5
Replace in </span><span>2x+5y=-25
=> 2(5) + 5y = - 25
5y = - 25 - 10
5y = - 35
y = - 35 / 5
y = - 7
2)
3x+7y=-21
3x-7y=63</span>
Add the two equations:
3x + 3x + 0 = - 21 + 63
6x = 42
=> x = 42 / 6
=> x = 7
Replace in <span>3x-7y=63
3(7) - 7y = 63
=> 7y = 21 - 63
=-> 7y = - 42
=> y = - 42 / 6
=> y = - 7</span>
Answer:
x=180-95-57 (sum of triangle)
or,x=28
Answer:
A=x(32-x)
Step-by-step explanation:
for a 32ft divider, e need to determine the length of the sides of the rectangular space. but since the length and breadth gives 32ft, we can express the side as
breadth= b,
length=x
x+b=32
b=32-x,
hence the area can be expressed as
A=l*x
A=x(32-x) unit square
the area expressed as a function of x is giving below
A(x)=x|(32-x)
Answer:
The correct answer is A.
Step-by-step explanation:
Given that a weather researcher compared Dublin, Ireland to Madrid, Spain, and she found that Dublin had a mean average temperature of 56.1ºF with a mean average deviation of 6.4ºF, while Madrid had a mean average temperature of 68ºF with a mean average deviation of 12.1ºF, the following conclusions can be drawn:
68 is higher than 56.1, so clearly Madrid has a higher average temperature than Dublin.
In turn, 12.1 is greater than 6.4, with which Madrid has a greater temperature variation than Dublin.
