Answer: 25x^2+15x-4
Step-by-step explanation:
Multply 5x by the other 5x
25x^2
Multiply 5x by 4
20x
Multiply -1 by 5x
-5x
Multiply -1 by 4
-4
Add them together
25x^2+20x-5x-4
Combine like terms
20x-5x=15x
25x^2+15x-4
Since a cube has 6 faces, just divide the total surface area by 6 to find the area of 1 face.
96 / 6 = 16
So, the answer is: The area of one face is 16 cm!
Answer:
13x+27
Step-by-step explanation:
Remove the parentheses: (a) = a
=5x+42+8x-15
Group like terms:
=5x+8x+42-15
Add similar elements: 5x+8x=13x
=13x+42-15
Add and subtract the numbers: 42-15=27
=13x+27
True. Percents are in hundredths, so you must divide the percent by 100 to get the decimal or the true number, and can then be used for calculations.
Answer:
x=-4, y=7
Step-by-step explanation:
-5x-10y=-50...(1)
Multiply both sides by -1:
5x+10y=50
5x=50-10y
x=(50-10y)/5
Substitute <u>x=(50-10y)/5</u> into second given eqaution:
10(50-10y)/5+8y=16
Cancel out common factor 5:
2(50-10y)+8y=16
100-20y+8y=16
-12y=16-100
-12y=-84
y=84/12
y=7
Substitute y=7 into equation (1)
-5x-10(7)=-50
-5x-70=-50
-5x=-50+70
-5x=20
x=-20/5
x=-4