So Serena is 10, and her mother is 3 times ten, so her mother is 30. And if we take 30 minus 10 we will have the age of the mom when Serena was born, which is 20. So we know that when Serena is 20, her mother will be 40. So when Serena is 20, she will be half of her mother's age. 40 × 0.5 = 20.
Y=x
basiclaly switch x and y
(x,y) now becomes (y,x)
(0,2) becomes (2,0)
answe ris (2,0) or aA
<span>1. write an algebraic expression for the word phrase ; the quotient of r and 12 . ( 1point )
A . r ./2
b. r*12
C. r - 12
D r + 12 IS THAT YOUR question ?
</span>
The rise from the ground by the skateboard is 5.5 inches
<h3>How to determine the height above the ground?</h3>
The length of the skateboard is given as:
Length (l) = 18 inches
The angle of elevation (x) is
x = 17∘
Represent the height with h.
The value of h is calculated using the following tangent ratio:
tan(x) = h/l
Make h the subject
h = l * tan(x)
Substitute known values
h = 18 * tan(17)
Evaluate
h = 5.5
Hence, the rise from the ground by the skateboard is 5.5 inches
Read more about elevation at:
brainly.com/question/19594654
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2*4^2+3(6/2)=Y
2*16+3(3)=Y
32+9=Y
41=Y
Hope this helps!