Answer:
31.8
Step-by-step explanation:
90-58.2=31.8
because the square in the middle means 90 degrees!
1 roll of tape: 1.28/2=$0.64
2 notepads: .87/3=.29x2=$0.58
2 highlighters: 1.59x2=$3.18
2 pens: $1.98
.64+.58+3.18+1.98=$6.38
Answer:
4KO2 + 2CO2 → 2K2CO3 + 3O2
Step-by-step explanation:
First we write the reaction in the asked form :
x1 KO2 + x2 CO2 → x3 K2CO3 + x4 O2
In a chemical equation, tha amount of substance that react is the same amount that is formed :
On each side of the equation we must have the same amount of K,C and O.
Let's write this in equations :
K balance :
C balance :
O balance :
The linear equations system is :
Let's equal to 0 to obtain a homogeneous equations system (for convenience) :
Let's work with the extended system matrix :
Working with the matrix :
→
→
→
→
→
The matrix is extended to the following linear system :
t∈ IR
Let's choose t=3 to eliminate the fractional numbers →
Answer:
d. 21.5
Step-by-step explanation:
To find the missing side length of each triangle, use the pythagorean theorem. The theorem is where a, b, and c are all side lengths of the triangle. a is the smallest lef and b is the other leg while c is always the hypotenuse or longest side.
In d, you'll use it twice to find the missing measure. First use it when a = 12 and b = 20. So you'll have:
Repeat the same process using a = 9 and c = 23.32. Then solve for the b value.