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Simora [160]
2 years ago
12

Solve the system of equations below. y=x-1 x+y=3

Mathematics
1 answer:
Airida [17]2 years ago
4 0

Answer:

x=2, y=1

Step-by-step explanation:

y=x-1

y=3-x

x-1=3-x

2x=4

x=2

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Complete the solution of the equation. Find the value of y when x equals to 9. 3x +4y=43
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Is there more to problem or is this it?


5 0
3 years ago
The table below shows the participation in the town soccer league during its first five seasons.
emmasim [6.3K]

Answer:

C.y=6.75x+81.25

Step-by-step explanation:

We are given that

In I year, number of participants=88

In V year, number of participants=115

We have to find the equation of the trend line that can be generated by using the data from years 1 and 5.

Rate of change of participants =\frac{change\;in;participants}{change\;in\;time}=\frac{115-88}{5-1}

Rate of change of participants,m=6.75

Point-slope form:y-y_1=m(x-x_1)

Where m=Rate of change of participants per year

x_1=5,y_1=115

By using the formula

Substitute the values then we get

y-115=6.75(x-5)

y-115=6.75x-33.75

y=6.75x-33.75+115

y=6.75x+81.25

Hence, option C is true.

8 0
3 years ago
Solve for c. <br>3(c + 2) = 9<br> C=​
slega [8]
C= 1 because 1+2= 3 3x3 = 9 so c equals 1
7 0
2 years ago
A textbook company states that the average time a student needs to take a quiz from its book is 30 minutes with a standard devia
faltersainse [42]

Answer:

We conclude that her students, on average, do not take 30 minutes on the quiz, contrary to what the textbook company states.

Step-by-step explanation:

We are given;

Population mean; μ = 30 minutes

Population standard deviation; σ = 3 minutes

Sample size; n = 10

Sample mean; x¯ = 25

Significance level = 5% = 0.05

Let's define the hypotheses;

Null hypothesis; H0: μ = 30

Alternative hypothesis: Ha: μ ≠ 30

Let's find the test statistic;

z = (x¯ - μ)/(σ/√n)

z = (25 - 30)/(3/√10)

z = -5.27

From online p-value from z-score calculator attached using, z = -5.27, significance level = 0.05, two tailed hypothesis, we have;

p < 0.00001

This is less than the significance level, and so we will reject the null hypothesis and conclude that Her students, on average, do not take 30 minutes on the quiz, contrary to what the textbook company stated.

8 0
2 years ago
Read 2 more answers
Consider the two functions shown here. Which function grows faster for large positive values of x?
fomenos
Where is the frationss
8 0
3 years ago
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