The correct answer:
______________________________________________________
Explanation:
______________________________________________________
Assuming you mean:
" √(9a²) + (√49b) − a + √b " ;
Simplify the expression:
_________________________________________________________
Note that: " √(9a²) = 3a " ;
"√(49b) = 7√b " ;
And we write the expression
→ " 3a + 7√b − a + √b " ;
Combine the "like terms:
" + 3a − a = 2a " ;
" + 7√b + 1√b = 8√b " ;
Rewrite:
________________________________________________________
" 2a + 8√b " ; which is: Answer choice: [C]: " 2a + 8√b " .
________________________________________________________
Answer:
pretty sure its A
Step-by-step explanation:
The quantity that has been decreased,
2.98-2.32=0.66
That is,
0.66/2.98*100=22%
Answer:
the Answer is B.
Step-by-step explanation:
Pythagorean theorem (applicable on right triangles only) says:
Where and are the two legs of the triangle and is the length of the hypotenuse [THE LONGEST SIDE].
We can square each leg on the triangle and take the sum, if that is equal to the square of the longest side, we have a right triangle. Let's check for all of these.
A.
They're not right triangle.
B.
This is a right triangle.
C.
They're not right triangle.
D.
They're not right triangle.
Only B is the right triangle
7 : 5 = 7x : 5x
7x + 5x = 12x
12x = 48 ⇒ x = 48:12 = 4
7x = 7 · 4 = 28
5x = 5 · 4 = 20
Answer: 28 : 20