Answer:
171 miles
Step-by-step explanation:
The scale drawing shows a distance of 4 1/2 inches, which is equal to 9*(1/2) inches. Since every 1/2 inch in the drawing represents 19 miles, the actual distance is 9*19, which is 171 miles.
You can also use dimensional analysis to solve this as follows: 
.
Use variables and set up equations.
Next, get one variable with equal coefficients.
Then get it alone on one side.
Now we can use substitution. Since
, substitute
for
in the other equation and you'll get an equation with just one variable to simplify and solve.
We can then use
in an earlier equation to find
.
Answer:
b. false
Step-by-step explanation:
when multiplying matrixes the number of columns of the first matrix must be equal as the number of rows of the second matrix, and since here matrix A has 4 columns but matrix B has 5 rows they can't be multiplied
Answer:
16.97056275
Step-by-step explanation:
12 squared + 12 squared = 288
square root of 288 = 16.97056275
