Answer:
6. B
7. D
Step-by-step explanation:
For 6 found that the 56 pieces in the first bag was about 18% of that bag. So then I found that 18% of 450 is ruffly 84, so B
For 7 I multiplied 5x5 is 25 so then 50x5 is 250, which is D
Answer:
The answer is "
f and g are arbitrary".
Step-by-step explanation:
The matrix of the device is increased
![\left[\begin{array}{ccc}1&3&f\\ c&d&g\\ \end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%263%26f%5C%5C%20c%26d%26g%5C%5C%20%5Cend%7Barray%7D%5Cright%5D)
Reduce the echelon row matrix
![\left[\begin{array}{ccc}1&3&f\\ c&d&g\\ \end{array}\right] \\\\R_1 \leftrightarrow R_2 \\\\\frac{R_2 -1}{C R_1 \to R_2} \sim \left[\begin{array}{ccc} c&d&g\\ 0 & \frac{3c-d}{c}& \frac{cf-g}{c}\\ \end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%263%26f%5C%5C%20c%26d%26g%5C%5C%20%5Cend%7Barray%7D%5Cright%5D%20%5C%5C%5C%5CR_1%20%5Cleftrightarrow%20%20R_2%20%5C%5C%5C%5C%5Cfrac%7BR_2%20-1%7D%7BC%20R_1%20%5Cto%20R_2%7D%20%20%20%5Csim%20%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D%20c%26d%26g%5C%5C%200%20%26%20%5Cfrac%7B3c-d%7D%7Bc%7D%26%20%5Cfrac%7Bcf-g%7D%7Bc%7D%5C%5C%20%5Cend%7Barray%7D%5Cright%5D)
Therefore, if 3c
0 is d 3c, the device is valid. Therefore d are arbitrary 3c, g and f.
Answer:
b,c
Step-by-step explanation:
b is written in the written form properly and is is extended using the right place values
The answer is 13 ft because 39 times 4 is 156 and 156 divided by 13 is 12
