Answer:
6 3/5 would become 33/5
Step-by-step explanation:
2 + 4 = 6
2/5 + 1/5 = 3/5
6 * 5 = 30
30 + 3 = 33
33/5
Solve it like an equation
4x-7>1
+7 +7
(-7+7)= 0 They cancel each other.
(1+7)=8
4x>8
/4 /4
(4/4) Cross it out, since they are both the same number. So, you stay with x.
(8÷4)= 2
You get x>2
Answer:
B
Step-by-step explanation:
You can just move upper y equation and it will be:
6x+3(3x-5)=15
6x+9x-15=15
15x-15=15
15x=30
x=2
B...
|-24+6|=18
Same for the other one.
Answer:
6√3
Step-by-step explanation:
Let's take the vertical side in the middle as y and the side on the left as z.
We have:
from the right triangle on the right:
9²+y²=x²
from the right triangle over the big triangle:
z²+x²=(9+3)²=12²
from the right triangle on the left:
3²+y²=z²
We can use substitution in our three equations to get x.
9²+y²=x²
z²+x²=12²
3²+y²=z²
First, solve for y² in terms of x². We want everything in terms of x so we can solve for it.
9²+y²=x²
subtract 9² from both sides
x²-81 = y²
plug that into the third equation
3²+(x²-81)=z²
x²-72=z²
z²+x²=144 (the second equation)
plug x²-72 for z²
x²-72+x² = 144
add 72 to both sides
2x² =216
divide both sides by 2 to isolate x²
x²=108
square root both sides to get x
x = √108 = 6√3
