Each term is the sum of the 3 terms before it ... kind of a bloated Fibonacci series.
Answer:
Step-by-step explanation:
26% is (26-20)/(50-20) = 6/30 = 1/5 of the way between 20% and 50%. That means 1/5 of the solution is 50% acid.
50% acid: 1/5 · 100 mL = 20 mL
20% acid: 100 mL -20 mL = 80 mL
Delbert must mix 80 mL of 20% acid and 20 mL of 50% acid.
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Maybe you'd like to see an equation. Let x represent the amount of 50% acid required. Then 100-x is the amount of 20% acid needed. The amount of acid in the mix is ...
0.50(x) +0.20(100 -x) = 0.26(100)
(0.50 -0.20)x = (0.26 -0.20)100 . . . . subtract 0.20(100)
x = (0.26 -0.20)/(0.50 -0.20)×100 = 20
This last expression should look a lot like the one we started with in this answer. It shows you how you can almost write down the answer to mixture problems without a lot of work.
Answer:
point form is: (-7,2)
equation form is: x = -7, y = 2
Step-by-step explanation:
add the equations in order to solve for the first variable. plug this value into the other equations in order to solve for the remaining variables
pls mark as brainliest lol
(f+g)(x)=0 means
f(x)+g(x)=0
x²-2+6x+4=0
x²+6x+2=0
using math and quadratic formula
x=-3+√7 or -3-√7
Rectangular pyramid can be formed by this net.
<u>Explanation:</u>
Any of the individual surfaces of a strong article an example of two-dimensional shapes that can be collapsed to make a model of a strong figure a strong figure with a base that is a polygon and sides that are triangles that meet at the top the all out zone of the outside of a strong figure is known as net.
From this net various shapes can be formed. One of the shapes that can be formed from this is the pyramid but of a rectangular shape.