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labwork [276]
3 years ago
12

Determine if the following system of equations has no solutions, infinitely many

Mathematics
1 answer:
Lesechka [4]3 years ago
7 0

Step-by-step explanation:

  • 5x+6=1

5x=1-6

5x=-5

<h3> x=-1</h3>
  • x=-1 in -5x-8y=2

-5(-1)-8y=2

5-8y=2

-8y =2-5

-8y=-3

<h3> y=3/8</h3>
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Solve for n.<br><br> n−10=5−4n
Alisiya [41]
N = 3. Add 10 to both sides. Add 4n to both sides. Divide 4 from both sides. 

8 0
3 years ago
Read 2 more answers
Frazer scores 70% in a spelling test with 20 questions. How many did he get right? Show me your work.
ladessa [460]
Fraser got 14 questions right

questions correct 70/5 = 14
—— ——
total questions 100/5 = 20

therefore he got 14 questions right

you divide 100 by 5 because percents are always out of 100 and that gets you 20 which is how many questions the spelling bee had

then you do the same to the top (divide by 5) and get 14

14/20 questions were answered right
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4 0
3 years ago
Test the claim that the proportion of people who own cats is significantly different than 80% at the 0.2 significance level. The
sattari [20]

Answer:

C. H0 : p = 0.8 H 1 : p ≠ 0.8

The test is:_____.

c. two-tailed

The test statistic is:______p ± z (base alpha by 2) \sqrt{\frac{pq}{n} }

The p-value is:_____. 0.09887

Based on this we:_____.

B. Reject the null hypothesis.

Step-by-step explanation:

We formulate null and alternative hypotheses as  proportion of people who own cats is significantly different than 80%.

H0 : p = 0.8 H 1 : p ≠ 0.8

The alternative hypothesis H1 is that the 80% of the  proportion is different and null hypothesis is , it is same.

For a two tailed test for significance level = 0.2 we have critical value  ± 1.28.

We have alpha equal to 0.2  for a two tailed test . We divided alpha with 2 to get the answer for a two tailed test. When divided by two it gives 0.1 and the corresponding value is ± 1.28

The test statistic is

p ± z (base alpha by 2) \sqrt{\frac{pq}{n} }

Where p = 0.8 , q = 1-p= 1-0.8= 0.2

n= 200

Putting the values

0.8 ± 1.28 \sqrt{\frac{0.8*0.2}{200} }

0.8 ± 0.03620

0.8362, 0.7638

As the calculated value of z lies within the critical region  we reject the null hypothesis.

8 0
2 years ago
Please add explanation as well.
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3 0
3 years ago
Which graphs represent functions?
pogonyaev
I would say the answer is c. only graph d ,, think of the line test to see if a graph is a function or not
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