Answer:
a = 10
Step-by-step explanation:
Since the quantities vary directly then the equation relating them is
y = kx ← k is the constant of variation
To find k use the point (2, 5 ) with x = 2 and y = 5
k = = = 2.5
y = 2.5x ← equation of variation
Using the point (4, a) with x = 4, then
y = a = 2.5 × 4 = 10
2x²-10xy+3xy-15y²
Add like terms.
2x²+ (-10xy+3xy) -15y²
Simplify.
2x² + (-7xy) - 15y²
Rearrange the equation.
2x²-15y²-7xy
~Hope I helped~
Answer:
B, She stopped to change a flat tire
Step-by-step explanation:
from minute 3 - 5, Anita was at a standstill. she did not speed up and pass Susana, as she wasnt moving
she didnt go up a hill because that requires moving
she did not win the race because there is more to the graph
Answer:
2/1=2
Step-by-step explanation:
y=mx+b= 2
3-1=2
-3-(-4)=1
2/1=2
Answer:
hope this helps :)
Step-by-step explanation:
a) yes, this is a polygon (shape with 4 sides)
b) the polygon is a concave
c) equilateral
d) this type of polygon is called 'arrowhead'