How many terms are there in the following expression: 3a + 3ab + 7b – 2c – 4d?
2 answers:
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There are 13 white marbles in the bag.
Step-by-step explanation:
Given,
Total number of marbles = 24
Let,
x represent the number of white marbles.
y represent the number of yellow marbles.
According to given statement;
x+y=24 Eqn 1
x = 2y-9 Eqn 2
Putting value of x from Eqn 2 in Eqn 1
Dividing both sides by 3
Putting y=11 in Eqn 2
There are 13 white marbles in the bag.
Keywords: linear equation, substitution method
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Answer:
B and E
Step-by-step explanation:
Given the rational expression
← factorise the denominator
2x² - 32 ← take out a common factor of 2 from each term
= 2(x² - 16) ← (x² - 16) is a difference of squares
= 2(x - 4)(x + 4)
The expression can now be written as
The denominator of the expression cannot be zero as this would make the expression undefined. Equating the denominator to zero and solving gives the values that x cannot be.
2(x - 4)(x + 4) = 0
Equate each factor to zero and solve for x
x - 4 = 0 ⇒ x = 4
x + 4 = 0 ⇒ x = - 4
These are the values of x that make the expression undefined.
x = 4 → B
x = - 4 → E