Answer:
13b - 19
Step-by-step explanation:
Because 6b and 7b are like terms so we add them. And 19 is not a like term so we connot add them.
Answer:
45(a + 2b)
Step-by-step explanation:
45a
step1 in order to factor an integer, we need to repeatedly divide it by the ascending sequence of primes (2, 3, 5...) The number of times that each prime divides the original integer becomes its exponent in the final result
Prime number 3 to the power of 2 equals 9 .
Prime number 5 to the power of 1 equals 5 .

90b
do the same as above
Prime number 2 to the power of 1 equals 2 .
Prime number 3 to the power of 2 equals 9 .
Prime number 5 to the power of 1 equals 5 .

Answer:
she can make 8 batches
Step-by-step explanation:
In this question , we are concerned with calculating the number of batches of cupcakes keith can make.
To make a batch, 5/8 of a cup is required.
Now she has 5 cups. The number of batches she can make will be 5/(5/8) = 5 * 8/5 = 8