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3 years ago

Real talk shhhh

Mathematics

1 answer:

abruzzese [7]3 years ago

3 0

Answer:

15. 8

Step-by-step explanation:

The man and the son form similar triangles, so the lengths of corresponding sides of the triangles are proportional.

6/8 = x/4

8x = 24

x = 24/8

x = 3

Answer: 3

Question 15

Triangles SCA and STR are similar, so the lengths of corresponding sides are in proportion.

SA + AR = SR

SA + 3 = 9

SA = 6

SA/SR = SC/ST

6/9 = SC/12

2/3 = SC/12

3SC = 2 * 12

3SC = 24

SC = 8

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The principal expects 62 people at a teacher conference. If each table seats 8 people, how many tables will be needed for the co

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Hai has 1 gallon jug of water. He drinks 1/8 gallons of water before lunch and 2/3 gallons of water after lunch. How much water

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2 years ago

Find the value of the variable if P is between J & K. JP = 2x ; PK = 7x ; JK = 27

Nana76 [90]

J ---- P --- K

JP = 2x
PK = 7x
JK = 27

2x + 7x = 27
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x = 27/9
x = 3

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7 0

3 years ago

In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for

Setler [38]

Answer:

7) d)

standard error of the mean of one sample of 'n' observation = 0.20

8) a)

The margin of Error = 0.392

9) d

The 95% of confidence intervals are (8.61 , 9.39)

Step-by-step explanation:

solution:-

The Given data sample size 'n' = 81

Given Population standard deviation 'σ' = 1.8 hours

The standard error of the mean of one sample of 'n' observation is

Standard error (SE)

= $\frac{S.D}{\sqrt{n} }$

= σ / √n

= $\frac{1.8}{\sqrt{81} } =0.2$

standard error of the mean of one sample of 'n' observation = 0.20

Solution:-

The Given data sample size 'n' = 81

Given Population standard deviation 'σ' = 1.8 hours

Given the probability is 0.95

The z- score = 1.96 at 0.05 level of significance.

The margin of Error = $\frac{z_{0.95} S.D}{\sqrt{n} }$

= $\frac{1.96 (S.D)}{\sqrt{n} }$

= $\frac{1.96 (1.8)}{\sqrt{81} }$

= 0.392

The margin of Error = 0.392

Solution:-

The 95% of confidence intervals are

$(x^{-} - 1.96\frac{S.D}{\sqrt{n} } , x^{-} + 1.96\frac{S.D}{\sqrt{n} } )$

$(9 - 1.96\frac{1.8}{\sqrt{81} } , 9+ 1.96\frac{1.8}{\sqrt{81} } )$

(9 - 0.392 , (9 + 0.392)

(8.609 , 9.392)

The 95% of confidence intervals are (8.61 , 9.39)

4 0

3 years ago

PLEASE HELPPPPPP 65 points

quester [9]

Answer:

x + 2y ≤ 12

x + 2y = 12

Step-by-step explanation:

The teachers can not give more than 12 hours of homework so this is the answer. those are the 2 equations you can use. It under 12 hours or equal to 12 hours.

7 0

4 years ago

Read 2 more answers