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ella [17]
3 years ago
6

Twin​ brothers, person a and person​ b, can mow their​ grandparent's lawn together in 18 minutes. person a could mow the lawn by

himself in 15 minutes less time than it would take person
b. how long would it take person b to mow the lawn by​ himself?
Mathematics
1 answer:
Alex777 [14]3 years ago
5 0
What are the answer choices
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What is the margin of error for a yes/no survey of 200 people with a proportion of 65% who answered \"yes\"?. A. ±3.37%. B. ±5.0
azamat
\sqrt{(p*q)/n}

where p is the number of positive outcomes (yes) and q is the number of negative outcomes (no).

\sqrt{(0.65*(1-0.65))/200} = 0.0337 or 3.37%

answer is A.
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The amount of paper recycled is directly proportional to the number of trees that recycling saves. If recycling 2,000 pounds of
aleksandrvk [35]
Aproximately 42 trees my friend
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162 ⋅ 90 238·56 238 ⋅ 34 =
ollegr [7]

1572455566080 is your answer! Hope I helped! :D

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3 years ago
Read 2 more answers
Shanna is planning a trip from Dallas, Texas, to San Diego, California. She knows that the distance she will travel is
enot [183]

Answer:

4.67 inches

Step-by-step explanation:

Shanna is planning a trip from Dallas, Texas, to San Diego, California.

She will travel about = 1,400 miles

The scale of a map is 300 miles = 1 inches

The trip of 1,400 miles = \frac{1400}{300}

                                    = 4.66666 inches ≈ 4.67 inches

Her trip is 4.67 inches far on the map.

3 0
3 years ago
On a certain hot summers day , 293 people used the public swimming pool. Daily prices are $1.50 for children and $2.50 for adult
fredd [130]

C = children

A = adults

293 = c + a

1.50c + 2.50a = 676.50

We can use substitution to solve:

c + a = 293 subtract a to get c = 293 - a

Plug this into the second equation:

1.50(293 - a) + 2.50a = 676.50

439.5 - 1.50a + 2.50a = 676.50

439.5 + 1a = 676.50

a = 237

Substitute this into the first equation:

293 = c + 237

56 = c

8 0
3 years ago
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