Step-by-step explanation:
1. 4/10 + 15/10
The two fractions have like denominators so you can add the numerators.
Then:
4+15/10=19/10
This fraction cannot be reduced.
The fraction
19/10
is the same as
19÷10
Convert to a mixed number using
long division for 19 ÷ 10 = 1R9, so
19/10=19/10
Therefore:
4/10+15/10=1 9/10
2. 50/20+60/20=5 1/2
3. 
4. 
5. 
6. 
7. 
8. 
First, rewrite the equation 
with the base equal to 5. Note that:
Then
Since the bases are equal, you have that powers are equal too:
Answer: 
I got 105in². When you multiply the two roots, everything goes under one 'roof', and then it's a matter of taking out the perfect squares.
Like: √175 × √63
√(7×5×5) √(3×3×7)
the pairs come out
7×5×3 = 105
Hope that's not toooooo confusing xD
Let the middle point be M.
MDC is a isometric triangle.
∠MDC = MCD = 25°
∠DBC = 180-25-25-35 = 95°
Answer A
The sqrt(16) is 4 and the sqrt(25) is 5. 18 is between these two numbers
