One way is to graph it and do the vertical line test
it is not a function if we can draw a vertical line in the graph that passes through 2 points of the graph
if we graph this function, we see there is no place we can draw a vertical line and hit the line twice
Each of the following correctly match an English phrase with a mathematical expression except _____.
<span>A) a number times seven, 7x </span>
<span>B) a number subtracted from seven, 7 - x </span>
<span>C) the sum of a number and seven, 7 + x </span>
<span>D) a number divided by 7, 7/x
if this is ur question...answer is D...should be x/7</span>
Answer:
I am sorry, I do not know what Rational Coefficients are but y=12.5.
Step-by-step explanation:
If you have 1.2y=15 then you divide both answers by 1.2 and then you get y=12.5. Hope this helps, Let me know if correct!!
Answer:
Integers, whole numbers and polynomials are sets of closed under multiplication.
Only Irrational numbers are not the sets of closed under multiplication.
Step-by-step explanation:
To find : Which of the following sets are closed under multiplication?
1. Integers
Yes, integers is a sets of closed under multiplication as if you multiply an integer by an integer, you will always get another integer.
Example -
is an integer
2. Irrational numbers
No, irrationals are not closed under multiplication.
Example -
is a rational number
3. Whole numbers
Yes, whole numbers is a sets of closed under multiplication as if you multiply a whole number by a whole number, you will always get another whole number.
Example -
is a whole number
4. Polynomials
Yes, polynomial is sets of closed under multiplication as if you multiply the variables' exponents are added, and the exponents in polynomials are whole numbers so the new exponents will be whole numbers.
Example -
is a polynomial.
The expression (5×20-3)÷7 can be used to find the number of groups.
False
The expression (4×20-3)÷7 can be used to find the number of groups.
True
There will be 11 tour groups.
True
There will be 77 tour groups.
False