Answer:
v=18
u=4
Step-by-step explanation:
v/3=6
v=18
2u+2=5u-10
3u=12
u=4
Answer:
yuu okay?
Step-by-step explanation:
Answer:
12 units
Step-by-step explanation:
Because the two triangles are similar:
![\dfrac{x}{9}=\dfrac{16}{x} \\\\\\\dfrac{x^2}{9}=16 \\\\\\x^2=144 \\\\\\x=12](https://tex.z-dn.net/?f=%5Cdfrac%7Bx%7D%7B9%7D%3D%5Cdfrac%7B16%7D%7Bx%7D%20%5C%5C%5C%5C%5C%5C%5Cdfrac%7Bx%5E2%7D%7B9%7D%3D16%20%5C%5C%5C%5C%5C%5Cx%5E2%3D144%20%5C%5C%5C%5C%5C%5Cx%3D12)
Hope this helps!
Answer:
d. 28
Step-by-step explanation:
I'm going to show you how to do these types of problems and the other two you should try by yourself.
There are 63 bikes. The ratio is 4:5 blue to red.
4x+5x=9x
9x=63
x=7
blue: 4x = 4*7=28
Answer: y=2x-1
We know that the equation of a line is y = mx + b, where m is the gradient and b is the y-intercept.
First to find the gradient, we use the formula y2-y1/x2-x1.
x1 and y1 being the first set of coordinates (2,3) and x2 and y2 being the second set (4,7)
Now we sub in:
m=7-3/4-2
m=4/2
m=2
This is our gradient and we can put it into the equation: y=2x+b
Now we find the y-intercept (b). Since the y-intercept isn’t shown, we can sub in the coordinates to find it.
y=2x+b
Sub (2,3)
3=2(2)+b
3=4+b
-1=b
Sub (4,7)
7=2(4)+b
7=8+b
-1=b
Subbing in both coordinates gives us -1 as the y-intercept, so the finished equation is: y=2x-1