How many terms are there in the expression 3x2 + 2x - 4? A:1 B:2 C:3 D:4
2 answers:
Answer:
The correct option is C.
Step-by-step explanation:
The given expression is
Definition of term: A term is either a single number or variable, or product of numbers and variables. The signs +, −, / and = are used to separate the terms.
In the given expression the variables are separated by + and −.
The given expression has three terms .
Therefore the correct option is C.
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(a) Animals by popularity; Dogs, Cats, Others, Horses.
(b) If 250 students were interviewed, 20 students have other pets.
(c) No, it was incorrect.
Step-by-step explanation:
Step 1; We arrange the different pets in chronological order, from the highest percent to the lowest percent;
1. Dogs - 67%,
2. Cats - 20%
3. Others - 8%,
4. Horses - 1%.
None is not included in this list.
Step 2; If 250 students were interviewed, 8% of those have other pets. So we need to calculate how much 8% of 250 is.
8% of 250 = × 250 = 0.08 × 250 = 20.
So 20 students had other pets.
Step 3; 20% of the interviewed students had cats. If 75 students had cats, we need to equate 20% to the 75 and find out how many students were actually interviewed.
20% × x = 75, 0.2 × x = 75,
x = = 375.
So if 375 students were interviewed, 75 students would have cats. So the estimate of 250 students being interviewed is incorrect.