y=13.34 when x=15
Step-by-step explanation:
We are given that x varies directly with y i.e y ∝ x
We know that: y ∝ x then
y= k/x
where k is constant.
So, if y=10 and x=20 we can find k
Now, we need to find y when x=15
We know that k = 200,
So, 
So, y=13.34 when x=15
Keywords: Direct variation
Learn more about Direct variation at:
#learnwithBrainly
Answer! :
y = -2x + 5
Step by Step! :
slope intercept form:
y = mx + b
m being slope, b being the y intercept.
To find the slope, use this equation:
y^2 - y^1 / x^2 - x^1
Plug in your points.
(-1) - (7) / (3) - (-1)
-8 / 4
-2 is your slope! (y = -2x + b)
To solve for b, plug in any one of your points and solve for b. Let's use (3, -1)
-1 = -2(3) + b
-1 = -6 + b
5 = b
Your new equation is...
y = -2x + 5
The answer to this is A) For 8 birdhouses, he will need 16 trapezoids.
(B = 12*4 is 48 not 16.) (C = A 2 to 1 ratio.) (D = a 1 to 2 ratio.) Hope that helps!
Step-by-step explanation:
blue(b)=13
yellow(y)=12
total(b+y)=25
percentage of blue marbles=13/25 ×100
=13×4
=52%
