So in order to solve the question, you must find out what is 40% (or 40/100) of 65 students. To do this you use the following equation:
65(students) X 40/100= number of students that bought a t-shirt.
26 students bought a t-shirt, so 26 shirts were purchased
ANSWER: D. 26
Answer:
x = -1 and y = -4
Step-by-step explanation:
It is given that,
3x - 2y = 5 ----(1)
-2x - 3y = 14 ------(2)
<u>To find the solution of equations</u>
(1) * 2 ⇒
6x - 4y = 10 -----(3)
(2) * 3 ⇒
-6x - 9y = 42 ----(4)
eq(3) + eq(4) ⇒
6x - 4y = 10 -----(3)
<u>-6x - 9y = 42 </u> ----(4)
0 - 13y = 52
y = 52/(-13) = -4
Substitute the value of y in eq(1)
3x - 2y = 5 ----(1)
3x - (2 * -4) = 5
3x +8 = 5
3x = 5 - 8 = -3
x = -3/3 = -1
Therefore x = -1 and y = -4
Answer:
14.4 m/s
Step-by-step explanation:
The speed of the car can be found by dividing the distance by the time. The distance is 0.8m 9 times or 0.8(9)=7.2 meters and the time is 0.5 seconds
![s=\frac{d}{t} \\s=\frac{7.2}{0.5} \\s=14.4](https://tex.z-dn.net/?f=s%3D%5Cfrac%7Bd%7D%7Bt%7D%20%5C%5Cs%3D%5Cfrac%7B7.2%7D%7B0.5%7D%20%5C%5Cs%3D14.4%20)
Range is the y values
(x,y)
so just get the last values, ignore repeats
2,4,2,4
eliminate repeats
range is (2 and 4)