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s344n2d4d5 [400]
3 years ago
11

Use substitution method to solve the system of equations. 2x+5x=132y-3x=5​

Mathematics
1 answer:
Nina [5.8K]3 years ago
4 0

Answer:

x=3/7  y=37/7

Step-by-step explanation:

7x=13 x=13/7

2y-3*13/7=5

14y-39=35

14y=74

y=74/14=37/7

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SOLVE BY SUBSTITUTION OR ELIMINATION<br> 7y=9x+20, 33= -12y-7x
grigory [225]

Answer:

Point Form:

(−3,−1)

Equation Form:

x=−3,y=−1

Step-by-step explanation:

3 0
2 years ago
A meeting takes place between a diplomat and fifteen government officials. However, ten of the officials are actually spies. If
tigry1 [53]

Answer:

the answer is 45% you are welcome

8 0
2 years ago
Write an inequality and solve each problem.
baherus [9]
The unknown number equals x. (you can use any other letter)
the unknown number is being subtracted by 3.
x-3.
now if it is no more than 2, it must be less than 2,
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6 0
3 years ago
Of those women who are diagnosed to have early-stage breast cancer, one-third eventually die of the disease. Suppose a screening
Finger [1]

Answer:

A) Alternative hypothesis; Ha: p_o > ⅔

B) Null hypothesis;

H0: p_o = ⅔

C) There is sufficient evidence to support the claim that the community screening programme was effective

D) p-value = 0

Its less than the significance value and so we will reject the null hypothesis and conclude that the community screening programme was effective

Step-by-step explanation:

A) We are told that ⅓ of those diagnosed eventually die of the disease. Thus, ⅔ is the fraction that will survive the disease.

Thus, the null hypothesis is;

H0: p_o = ⅔

We are told that a screening programme was started to increase the survival rate. Thus,the alternative hypothesis is;

Ha: p_o > ⅔

B) null hypothesis is;

H0: p_o = ⅔

C) 164 out of the 200 women selected survived the disease.

Thus sample proportion is;

p^ = 164/200

p^ = 0.82

For the z-score value, we will use the formula;

z = (p^ - p_o)/√((p_o(1 - p_o)/n)

Now, p_o = ⅔ = 0.67

Thus;

z = (0.82 - 0.67)/√((0.67(1 - 0.67)/200)

z = 4.51

From online p-value from z-score calculator, we have p-value ≈ 0

This is less than the significant level of 0.05 and therefore we will reject the null hypothesis and conclude that the community screening program was effective.

D) p-value ≈ 0

Reject the null hypothesis

4 0
2 years ago
What is the answer to this i need help please
Contact [7]

Answer:

-(√2) + √3

Step-by-step explanation:

2√3 - (√2 + √3)

2√3 - √2 - √3

2-1√3 - √2

√3 - (√2)

or.

-(√2) + √3

the answer is not in the possible answers

5 0
3 years ago
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