<span>10x + 7y = 49
</span><span>10y – x = 70 so x = 10y - 70
substitute </span>x = 10y - 70 into 10x + 7y = 49
10x + 7y = 49
10(10y - 70) + 7y = 49
100y - 700 + 7y = 49
107y = 749
y = 7
x = 10y - 70 = 10(7) - 70 = 0
answer
(0, 7)
hope it helps
Answer:
C. Approximately normal
Step-by-step explanation:
We know that when we have, np≥10, and n(1−p)≥10, and both of these are true, where n is the sample size, and p is the sample of proportions, the sampling proportions of sample distributions, will be normal in shape.
Expected successes : np=125(0.88)=110≥10
Expected failures : n(1−p)=125(1−0.88)=15≥10
Answer:
1
Step-by-step explanation:
10-9=1
Answer:
2 irrational solutions.
Step-by-step explanation:
6p^2 = 8p + 3
0 = -6p^2 + 8p + 3
The roots are:
p = (2/3) - (8.5)^(1/2)/3, and
p = (2/3) + (8.5)^(1/2)/3
These are irrational numbers.
There are 2 irrational solutions.
Answer:
Emmanuel purchased 11 pounds of soil last week.
Step-by-step explanation:
If we want to find the number of pounds of soil Emmanuel purchased last week, we will have to work backwards.
We know that the amount is 5 lb more than twice the amount of potting soil he bought last week. This info gives us an equation.
2x + 5 = 27, as its twice the amount last week and 5 lbs more. Now we solve.
2x + 5 = 27 | Subtract 5 from both sides
2x = 22 | Divide both sides by 2
x = 11
