Answer:
Step-by-step explanation:
13x-6y=10 (1,4)
x=1 y=4
⇒ 13*1-6*4=10
⇒ 13-24=10
⇒ -11≠10
⇒ (1,4) isn`t solution of the equation y=13x-6y
y=-3|x-5|+1 (1,-11)
x=1 y=-11
-11=-3|1-5|+1
-11=-3|-4|+1
-11=-3(4)+1
-11=-12+1
-11≡-11
⇒ (1,-11) is solution of the equation y=-3|x-5|+1
Answer:
2x+9
Step-by-step explanation:
If you times x by 2, you get 2x. 2x and '+9' aren't like terms so you have to separate them. You will end up with 2x+9
Answer:
1850 cents or $18.50
Step-by-step explanation:
50*8=400
3*35=105
5*269=1345 ($2.69 can be converted to 269 cents)
400+105+1345=1850
Answer:
a. 1844
b. 664
Step-by-step explanation:
a. No estimate of proportion is given so we will assume:
{p} = {q} = 0.5
For 99% confidence, z = 2.576
E = 0.03
Hence, Required sample size n = (0.5)*(0.5)*(2.576/0.03)^2 = 1844
b. {p} = 0.10
{q} = 1 - {p}
{q} = 1 - 0.10
{q} = 0.90
For 99% confidence, z = 2.576
E = 0.03
Hence, Required sample size n = (0.1)*(0.9)*(2.576/0.03)^2 = 664
c. There would have been no effect on parts a and b if entire US has been chosen because minimum sample size required is not dependent on population size.