Answer:
y=-3 x=1 (1,-3)
Step-by-step explanation:
y=x-4
y=6x-9
y+4=x
y+9=6x
difference = 5
x+5=6x
x=1
y=-3
1,-3
3(x^2+10x+5)-5(x-k)=
3x^2+30x+15-5x+5k=
3x^2+25x+15+5k
for this to be divisible by x every term must include x or get eliminated
the problematic terms are 15 and 5k
to eliminate them they must equal 0 when added:
15+5k=0
5k=-15
k=-3
so A) -3 is the solution
Answer:
B. Information from the sample is typical of information in the population.
Step-by-step explanation:
In Statistical Research, a Bias refers to the tendency of a sample statistic to systematically overestimate or underestimate a population parameter.
(A)When portions of the population are excluded or underrepresented from the sample, it is a Sampling Bias.
(C)When those responding to a survey or poll differ systematically from the nonrespondents, it is referred to as Non-Response Bias.
(D)When certain groups in the population are systematically underrepresented in the sample, it is referred to as Selection Bias.
Therefore option B is not an example of a Bias.
To round off a given number in decimals to one decimal place (1 dp), we simply take the figure right after the decimal and approximate the remaining after it. If the second number after the decimal is a significant number (5 and above) we make it 1 and add to the number right after the decimal. If its NOT a significant number, we simply disregard it. The solutions therefore are;
ANSWER:
Notice how the number in (1) becomes 0.7, after taking the next number (which is 9) and adding it as 1 to the number after the decimal (which is 6). The same applies to the number in (3).
