Answer:
A
Step-by-step explanation:
Given
x - 4 = - 2 ( add 4 to both sides )
x = 2 ( multiply both sides by 6 to clear the fraction )
5x = 12 ( divide both sides by 5 )
x =
= 2
→ A
Answer: 9 and 3/7
Step-by-step explanation: To multiply a mixed number by a mixed number, we first want to write each mixed number as an improper fraction.
We can write a mixed number as an improper fraction by multiplying the denominator by the whole number and adding the numerator.
We can change
to the improper fraction 30/7.
We can also change
to the improper fraction 11/5.
Now, we are simply multiplying fractions. To multiply fractions, we multiply across the numerators and multiply across the denominators. When we multiply these fractions, we will end up with the fraction 330/35. Since 330/35 is not in lowest terms, we need to divide both the numerator and denominator by the greatest common factor of 330 and 35 which is 5 and we will get the improper fraction 66/7.
Notice however that 66/7 can be changed into a mixed number by dividing the denominator which is 7 into the numerator which is 66.
66 divided by 7 equals 9 with a remainder of 3 so we can write 66/7 as the mixed number 9 and 3/7.
Therefore, 4 and 2/7 × 2 and 1/5 = 9 and 3/7
Answer: D
Density= mass/volume
12.9g/8cm3= 1.6 g/cm3
The teacher has to take 10 questions at a time from 12 questions.
Total ways = 12C10 = 12!/(10!)(12-10)! = 12 x 11 / 2 = 66
The teacher can make 66 different exams
Answer:
can u show us the question
Step-by-step explanation: