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3 years ago

Need help plz this question

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

7 0

7 tan puppies 15 -8 = 7

riadik2000 [5.3K]3 years ago

3 0

8 is the answer because 15-8 equals 7 here is worj

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Two brothers are 3 year apart in age. The sum of their ages is 35.How old is the younger brother?

guajiro [1.7K]

Answer:

The younger brother is 16 years old.

Step-by-step explanation:

The younger brother is aged x.

It follows that the older brother is aged x+3.

x + (x+3) = 35

2x + 3 = 35

2x = 32

x = 16

8 0

3 years ago

Read 2 more answers

The owner of a restaurant is reviewing customer complaints. In a random sample of 227 complaints, 57 complaints were about the s

iragen [17]

Answer:

$0.1375$ to $0.3624$

Step-by-step explanation:

Given :The owner of a restaurant is reviewing customer complaints. In a random sample of 227 complaints, 57 complaints were about the slow speed of the service.

To Find :Create a 95% confidence interval for the proportion of complaints that were about the slow speed of the service.

Solution:

n = 227

x = 57

Formula of confidence for proportion: $\widecap{p}-z_{\frac{\alpha}{2}}\sqrt{\frac{\widecap{p}\widecap{q}}{n}}$ to $\widecap{p}+z_{\frac{\alpha}{2}}\sqrt{\frac{\widecap{p}\widecap{q}}{n}}$

$\widecap{p}=\frac{x}{n}$

$\widecap{p}=\frac{57}{227}$

$\widecap{p}=0.25$

$\widecap{q}=1-\widecap{p}$

$\widecap{q}=1-0.25$

$\widecap{q}=0.75$

z at 95% is 1.96

Substitute the values in the formula :

Confidence for proportion: $0.25-1.96\sqrt{\frac{0.25 \times 0.75}{57}}$ to $0.25+1.96\sqrt{\frac{0.25 \times 0.75}{57}}$

Confidence for proportion: $0.1375$ to $0.3624$

Hence 95% confidence interval for the proportion of complaints that were about the slow speed of the service is $0.1375$ to $0.3624$

6 0

3 years ago

Read 2 more answers

CAN YOU PLEASE HELP ME WITH THIS

schepotkina [342]

Answer:

Step-by-step explanation:

a. 29/8 + 2(19/4) + 3(27/8) = 29/8 + 38/4 + 81/8 = 29/8 + 76/8 + 81/8 = 186/8 in.

b. 186/8 times 2 = 372/8 in

c. the shortest plane would be 27/8 and the largest would be 19/4 or 38/8.

If you subtract the two, you get 11/8. The difference is 11/8 in.

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4 years ago

Describe some similarities and differences between a situation that involves calculating surface area and a situation that invol

ki77a [65]

Usually when you are required to find the volume it’s when working with 3d objects or liquids

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3 years ago

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A train traveled 340 miles in 8 hours. If the train’s average rate of travel increased by 14 mph, what is the new average rate o

padilas [110]

D (56.5)

Originally, the train traveled 340 miles in 8 hours
If we use the formula d/t, we'll have 340/8, which is 42.5

If we add 14, then we'll have 56.5, or d

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4 years ago