Simplify 4a – 7b + 2ab – a + b. -ab 15ab 4a – 7b + 2ab 3a – 6b + 2ab

Option D.

Step-by-step explanation:

The given expression is

We need to find the simplified form of the given expression.

In this expression 4a and -a are like terms, and -7b and b are like terms.

Combined like terms in the given expression to find the simplified form of the given expression.

Therefore, the correct option is D.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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10 b/c 5*2 =10

step-by-step explanation: