<span>-8(n+3)+28=-5n-5
-8n-24+28=-5n-5
</span>-8n+4=-5n-5
-8n+4-4=-5n-5-4
-8n=-5n-9
-8n+5n=-5n+5n-9
-3n=-9
-3n/-3=-9/-3
n=3
n=3 is the correct answer
No, he is not right.
Integer is a number that can be written without a fractional component, and 1 3/4 doesn't.
Here's an image for you to better understand.
Step-by-step explanation:
You want to set one of the equations equal to either x or y. For this, I put x+y=-2 equal to y which would be y=-x-2. Then you plug this in to the other equation for y. This would give you 5x+2(-x-2)=2. When you factor the two into the parenthesis, combine like terms, and keep the x values on ones side and the other numbers on the other side, you get 3x=6
Answer:
2:25
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
The line from the vertex to the base is a perpendicular bisector and divides the isosceles triangle into 2 right triangles.
Using Pythagoras' identity in either of the 2 right triangles, then
( x )² + 3² = ( )²
x² + 9 = 45 ( subtract 9 from both sides )
x² = 36 ( multiply both sides by 4 to clear the fraction )
x² = 144 ( take the square root of both sides )
x = = 12 → A