Answer:
it is the third one
Step-by-step explanation:
Answer:
Step-by-step explanation:
sum of ratios=2+13=15
Number of teachers=(2/15)*180=24
Number of students=180-15=165
The figure is really just 3 triangles and 1 rectangle, as you see in the picture below.
notice the blue triangle has a base of 3 and a height of 2,
the green triangle has a base of 6 and a height of 1,
the yellow triangle has a base of 2 and a height of 6,
and the rectangle is a 7x6 rectangle.
we can simply get the area of each and sum them up, that's the area of the figure.
This exercise wants you to build a linear system of two equations and two unknowns.
To do so, we assign a variable to each of the quantity we want to calculate, so let's call the cost of one daylily and the cost of one shrub.
We know that Ashley bought 7 daylilies and 2 shrubs, so she paid
Similarly, Lisa spent
for 14 daylilies and 11 shrubs.
So, the system is
To solve the system, we must manipulate its equations in order to find the value of one particular variables. For example, we can multiply the first equation by 2 to get
Now, if you subtract the first equation from the second you have
So, one shrub costs 12 dollars. We can substitute this value for in any of the equation, and solve it for . For example, if we choose the first one we have
So, one daylily costs 3 dollars.
Answer:
b
Step-by-step explanation:
hope this helps you! have a good day!