Step-by-step explanation:
a. Pythagoras formula stated above
so 9²+12²
81+144 is 225
√252 is 15cm
b. in this question well have to use surds
an isosceles triangle had a 90 and 2x45 degree angles
we hypotenuse is 10cm
√a²+a² =10cm
√2a² is 10cm which makes
a√2 equals 10
then rearrange
a=10/√2= 5√2
the answer is 5√2
Answer:
the same as 1 and 2
Step-by-step explanation:
you should watch it care Fully and understand it's too esay .
Answer:
y=2x-8 x=12 y=16
Step-by-step explanation:
the function is y=2x-8
if x=12
y= 2 (12)-8=16
We need to find common denominators before we try to add. Let's try 72.
5/9→40/72 3/8→27/72
Let's add them together.
40/72+27/72=67/72; since 67 is prime, the fraction can't be simplified.
5/9 plus 3/8 equals 67/72
Take the square root of both sides
remember to take the positive and negative root
2x+5=-7 or
2x+5=7
solve each
2x+5=-7
subtract 5
2x=-12
divide 2
x=-6
2x+5=7
subtract 5
2x=2
divid 2
x=1
x=-6 or 1