Answer:
Number 4: Using Pythagoras Theorem,

Number 5:

3:
It is a right triangle
4:
Not a right triangle
For the last one:

Rounded down (because the answer needs to be a whole number) is 21
Answer:
f (7x-6)=28x-29
Step-by-step explanation:
f (7x-6)=28x-29
A=6 because 54/9=6
For b, the picture is not very clear and so I can’t see properly but if it says b/3 then b=45 because 15•3=45
c=11 because 23-12=11
I beleive the answer is B
Answer:
547
Step-by-step explanation:
Just subtract 813 - 266.
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