How to find the surface area of a triangular pyramid with slant height?
1 answer:
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Step-by-step explanation:
first step is to find the gradient of the line which "m" on the equation
gradient formula is y2 - y1 ÷ x2 - x1 = -½ as shown on the picture we substituted those points given
2nd step is to substitute on the equation y=mx+c
m= -½
y= 3 (you can choose any from those given points but in my case I chose point A)
x= -2
c= ? only unknown variable so we can can calculate it
substitute as shown on the picture to get c= 2
therefore our equation of the line will be y= -½x+2
Let's represent birds by the letter x and cats by the letter y. Since birds have 2 legs, and cats have 4, we can express this as:
We can solve by substitution. Let's solve for x in the second equation:
Replace every x in the first equation by that:
Now, plug that in for y in second equation and solve for x:
Since x was the number of birds and y was the number of cats in the store, there are 35 birds and 17 cats in the store.
We can solve by substitution. Let's solve for x in the second equation:
Replace every x in the first equation by that:
Now, plug that in for y in second equation and solve for x:
Since x was the number of birds and y was the number of cats in the store, there are 35 birds and 17 cats in the store.