Answer:
8 X 10^(9)
Step-by-step explanation:
Originally we have 10 digit phone numbers excluding the area code.
For each face value we have these in store: 0,1,2,3,4,5,6,7,8,9 (total 10)
But if we exclude 1 and 0 for the first digit, we are left with 8 digits.
8P1 X .......
In a phone number, digits can repeat so we can choose out of these 10 numbers freely after this.
8P1 X 10P1 X 10P1 X...
Adding the area code while assuming 10P1 is just 10...we get:
1 X 1 X 1 X 8 X 10^(9)
= 8000000000
Very interesting question, thanks for the opportunity!
<span>2x − 3y − z
</span><span> x = −2,
</span><span> y = 3,
</span><span> z = −2
What we must do is replace the values given in the equation. We have then replacing:
</span> 2*(-2) - 3*(3) - (-2) = -11
The answer is -11
.429 I think is the correct answer, I'm not 100% cure though.
Answer:
a
Step-by-step explanation:
4 -([3-1] x2)
so brackets first 3-1=2
second parentheses 2x2=4
third the rest 4-4=0
Answer:
m=2/3
Step-by-step explanation:
2y=-3x+1
y=-3/2x +1/2
m= -3/2
The reciprocal of the slope is perpendicular so the line would have to have a slope of 2/3