Let the number be n.
Adding a zero means multiplying the number by 10, 10n.
143-10n=3n, 13n=143 so n=11.
Answer:
slope=0
Step-by-step explanation:
y=mx+b
m=slope
we have
y=mx+7
y =0*x+7
y =7
so m=0=slope
9514 1404 393
Answer:
y = 9x
Step-by-step explanation:
We notice that each y-value is a multiple of 9, and the multiple is x.
y = 9x
Answer:
The only possible answer that is correct is the first one, x = -4.
Step-by-step explanation:
Simplify the given inequality as much as possible, and then substitute each of the given x values one by one to determine which is in the solution set.
9(2x + 1) < 9x - 18 becomes 18x + 9 < 9x - 18, which, if reduced by dividing all four terms by 9, becomes 2x + 1 < x - 2.
Simplifying further, we get x < - 3. The only possible answer that is correct is the first one, x = -4. -4 < -3 is true.
Answer:
D
Step-by-step explanation:
Nothing gets rid of the square root signs. That makes a and b incorrect as answers without doing a single calculation. Now the race is on between c and d.
The dot between f and g only means that f(x) and g(x) are multiplied together. There is nothing in that statement that helps us distinguish c and d.
So the two roots are multiplied together f·g(x) = √[(x + 7)(x - 2)]
Expand the two terms between the square brackets and you get
[x^2 + 7x - 2x - 14]. When you combine like terms you get
[x^2 + 5x - 14] or f·g(x) = √(x^2 + 5x - 14]
The answer is D