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andreyandreev [35.5K]
3 years ago
10

By using the elimination or substitution method. Find the point of intersection for the following pairs of straight lines. 3y +

x = 9 and y - x = -1
Mathematics
1 answer:
BaLLatris [955]3 years ago
8 0
X=3, and Y=2
(3,2)!!!!!!
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What is 2/3(n+6)=10?<br> What is n?<br> 2/3 is a fraction as two thirds
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First distribute the 2/3.
(2/3)n + (2/3)*6 = 10
(2/3)n + 4 = 10
Subtract 4 from both sides
(2/3)n = 6
Multiply both sides by (3/2) to clear the fraction
n = 9
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3 years ago
Solve the equation please!
yKpoI14uk [10]

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z=-60

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What is the product?<br> 3x[-6 -14 -11 -9]
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An insect population triples every 4 months. If the population started out with 24 insects, how many
SpyIntel [72]

Answer:

After 16 months there will be a population of 1,944 insects.

Step-by-step explanation:

Since an insect population triples every 4 months, if the population started out with 24 insects, to determine how many insects would there be in 16 months, the following calculation must be performed:

X = 24 x 3 ^ (16/4)

X = 24 x 3 ^ 4

X = 1,944

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3 0
3 years ago
Starting salaries of 90 college graduates who have taken a statistics course have a mean of $43,993 and a standard deviation of
inysia [295]

Answer:

a) E = 2482.90

b) 99% Confidence interval: (41510.1,46475.9)

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} =$43,993

Sample size, n = 90

Alpha, α = 0.051

Sample standard deviation, s = $9,144

a) The margin of error

Formula:

z_{critical}\text{ at}~\alpha_{0.01} = 2.576

E =z_{critical}\times \displaystyle\frac{s}{\sqrt{n}}\\\\E = 2.576\times \frac{9144}{\sqrt{90}}\\\\E = 2482.90

b) 99% Confidence interval:  

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

43993 \pm 2482.90 = (41510.1,46475.9)

3 0
3 years ago
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