Answer:
C.46 ft
Step-by-step explanation:
we know that
The perimeter of the garden is equal to sum three sides of the rectangle plus the circumference of a semicircle
so
we have
substitute the given values
Answer: 4 hours
Step-by-step explanation:
Assume x is the number of hours taken.
Garage A would therefore charge a total of:
= $9 + $1.50 * x
= 9 + 1.50x
Garage B would charge:
= $5 + $2.50 * x
= 5 + 2.50x
To find the number of hours it would take for them to be the same, equate both equations:
9 + 1.50x = 5 + 2.50x
9 - 5 = 2.50x - 1.50x
4 = 1x
x = 4 hours
That cost would be:
= 9 + 1.50 * 4
= 9 + 6
= $15
Answer:
900 miles
Step-by-step explanation:
Given that:
Distance from City A to city B = 1400 miles
Distance from City A to City C = 500 miles
Miles farther city B is from city A than city C is ;
Distance from A to B - Distance from A to C
1400 miles - 500 miles
= 900 miles
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:
43/90
Step-by-step explanation: