Answer:
25cm
Step-by-step explanation:
The radius of circles is 7cm,24cm
Area of smaller circle is πr
2
⟹π×7
2
⟹49π
Area of Larger circle is πr
2
⟹π×24
2
⟹576π
Area of required circle ⟹576π+49π
⟹625π
Radius of circle is given by
625
=25
Everyone works differently in mental meth.
To calculate 9*52, we note that 9=10-1, so mentally calculate
9(52)
=(10-1)(52)
=520-52 [ subtract 20 from each number]
=(520-20)-(52-20)
=500-32
=468.
Alternatively,
9*52=9*50+9*2=450+18=468
If you're good with multiplication and division,
9*52=3*3(52)=3*156=450+18=468
Answer:
6. b
7.
8. d
9. a
Step-by-step explanation:
I'm not sure what 7 is but I can assure you that 6, 8, and 9 are correct
Answer: -39
Step-by-step explanation:
Hope this helps.
Answer:
X= -0.4545
Step-by-step explanation:
YOU HAVE TO SUBTRACT .2Z FROM .4Z WHICH GETS YOU .2 ON THE RIGHT SIDE
THAT WOULD MEAN YOU HAVE TO CLEAR OUT THE SEVEN BY ADDING IT ON BOTH SIDES GETTING -1
THEN YOU WOULD HAVE -1=.2Z
THEN DIVIDE BY .2 GETTING YOU A TOTAL OF -0.4545 WHEN YOU FINISH DIVIDING
