If you choose 10 swimmers and 4 are Stingrays, you can say that Stingrays make up roughly 40% of the swimmers. If 20 Stingrays make up 40% of all the swimmers, we just have to find what number 20 is 40% of. That’s easy enough by cross multiplication:
20/x = 40/100
20/x = 4/10
20/x = 2/5
x = 50.
Double check by multiplying 50 * 0.4. Since 50 * 0.4 = 20, we know we have the right answer. There are about 50 swimmers on this team.
Answer:
B. 95º
Step-by-step explanation:
Supplementary angles are ones that add up to 180º.
So if angle 1 is 85º, then the equation would be:
(x-the measure of angle 2)
X + 85 = 180
Solve for x:
X + (85-85) = 180-85
X = 95.
Hope this helps! Have a great day!
Answer:
y = -x - 1
Step-by-step explanation:
Y=2(x+3)^2+2
y=2(x^2+6x+9)+2
y=2x^2+12x+20
dy/dx=4x+12
The graph is decreasing when dy/dx, which is velocity, is less than zero so:
dy/dx<0 when:
4x+12<0
4x<-12
x<-3
So the graph is decreasing from x=(-oo, -3)
Answer:
The last option: 3^(7/10).
Step-by-step explanation:
√3 * ⁵√3
= 3^1/2 * 3*1/5
= 3^(1/2*1/5)
= 3^(7/10).