1.) Set up an equation
50+80h=310 h stands for hours
-50 - 50
80h= 260
divide 80 to both sides
h=3.25
The mechanic works for 3 hours and 25 minutes
It is choice (D)
Let's set that unknown number to x.
The first step is the difference of 3 times a number and 15 --> 3x - 15
That is no less than the square of the number ' '
Now combine them
Hope that helped!
a) 24% said they wanted to learn french.
To find total number of students surveyed divide the number of students that want to learn French by the percentage:
12 / 0.24 = 50
There were 50 students surveyed.
b) 36% wanted to learn Spanish, multiply 50 by 36%
50 * 0.36 = 18
18 students wanted to learn Spanish.
Answer: The distance between m and I can 7 cm or 1 cm.
Explanation:
According to the question, distance between point M and line m= 3 cm
Distance between point M and line I=4 cm
Since, according to the given data there can be two cases possible.
M can be a point between these two lines
In this case the distance between m and I = distance between point M and line m + distance between point M and line I= 3+4=7 cm
M can be the point above the line m(where line m is above the line I)
In this case the distance between m and I= Distance between point M and line I- distance between point M and line I= 4-3=1 cm
Note: we can not take the case in which M is the point above the line I where line I is above the line m because in that case distance between M and m must be greater than 3 which can not be possible.