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4 years ago

Tom has saved $128, and his goal is to save $500. how much more must he save? which equation best represents this situation?

Mathematics

2 answers:

Margaret [11]4 years ago

7 0

He gone have to save 372 more

Vladimir79 [104]4 years ago

4 0

He must save $372 more dollars; 500-128=x

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You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confide

Lubov Fominskaja [6]

Answer:

90% confidence interval, (109.47,116.53)

For 95% confidence interval (108.79,117.21)

Step-by-step explanation:

n =50

mean = 113

standard deviation = 15.20

a.) For 90% confidence interval, z=1.645

90% confidence interval is

$(113 - \frac{1.645*15.20}{sqrt(50)},113 + \frac{1.645*15.20}{sqrt(50)}}$

=(113 - 3.53, 113 + 3.53)

=(109.47,116.53)

b.)For 95% confidence interval, z = 1.96

95% confidence interval is

$(113 - \frac{1.96*15.20}{\sqrt(50)},113 + \frac{1.96*15.20}{\sqrt(50)}$

=(113 - 4.21, 113 + 4.21)

=(108.79,117.21)

4 0

3 years ago

The area of a playground is 256²m find the length of the playground

Sauron [17]

Answer:

I'm pretty sure the length is 16m.

Step-by-step explanation:

If the area is a total of 256^2 m, then finding the square root of that area would get you the side length of the playground. The square root of 256 is 16, therefore the sidelength of the playground is 16m :)

8 0

4 years ago

Solve each inequality using the Addition Property of Inequality.

Law Incorporation [45]

Answer:

y ≥ 28

Step-by-step explanation:

Isolate the variable. Treat the inequality sign as a equal sign, what you do to one side, you do to the other. Add 6 to both sides:

y - 6 (+6) ≥ 22 (+6)

y ≥ 22 + 6

y ≥ 28

y ≥ 28 is your answer.

4 0

3 years ago

A scientist is studying the motion of waves by measuring the distance between the crests and troughs of waves in a particular ar

Vikentia [17]

Answer:

this is correct on plato/edmentum

Step-by-step explanation:

3 0

3 years ago

What is 250/12 plus 100/21 add all that up to get your answer

Dafna1 [17]

Answer:

1075/42

Step-by-step explanation:

$\dfrac{250}{12}+\dfrac{100}{21}=\dfrac{250(21)+(12)100}{(12)(21)}=\dfrac{6450}{252}\\\\=\dfrac{(6)(1075)}{(6)(42)}=\boxed{\dfrac{1075}{42}}$

8 0

3 years ago