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Alinara [238K]
3 years ago
9

Plz help meh. In a small town in Utah, 40,000 homes used to have land-line phones. If there was a 12.5% decrease, how many homes

now have land-line phones?
Mathematics
1 answer:
Vlada [557]3 years ago
7 0

Answer:

35000 homes

Step-by-step explanation:

what i did was multiply 40000 by 0.125 to find the percentage of ppl who decreased. this resulted in 5000. next u subtract 5000 by 40000 to get 35000. hope this helped!

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The ratio of boys to girls at a movie is 4:7. If there are 21 girls, how many boys are ar the movie?​
Korolek [52]

Answer:

ratio of boys to girls= 4:7

number of girls=21

now,

\frac{boys}{girls}  \times \frac{no.of  \: boys}{no.of \: girs}

\frac{4}{7}  \times  \frac{boys}{21}

4 \times 21 = 7boys\: \\   \:  ({cross multiplication})

84  = 7boys

\frac{84}{7 \: }  = boys \:  \:  \: (dividing \: 84 \: by \: 7)

12 = boys

no.of \: boys = 12

3 0
3 years ago
Please help! Thank you. Which rule explains why these triangles are congruent?
Setler79 [48]

Answer:

AAS

Step-by-step explanation:

3 0
3 years ago
Nick and Adam work together. Nick weighs 160 pounds and is gaining about 3 pounds per week. Adam weighs 195 pounds and is losing
Monica [59]

Answer:

160+3x=195-2x

Step-by-step explanation:

So if Nick is 160 lbs and Adam 195, and Nick is gaining 3 pounds per week and Adam is losing 2 pounds per week then you have to use a variable to find the unknown which is the number of weeks. So a gain is positive or addition and a loss is negative of subtraction. Then to solve it put the variables together and the numbers together. The opposite of -2x is 2x so 3x plus 2x and 195 plus the opposite of 160 which is -160 then solve for x.

6 0
3 years ago
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If a box has a length of 12 inches, a width of 10 inches and a height of 6 inches, what is the surface area?
Scrat [10]

Answer:

The answer is 28.

Step-by-step explanation:

Add all of them.

(L/ length) 12.

(W/ width) 10

(H/ height) 6

12 + 10 + 6 = 28

I hope this helps

6 0
3 years ago
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According Two data from the 2010 United States Census 83.7% of Americans lived in the metropolitan area suppose maria researcher
Murrr4er [49]

Answer:

Mean is 83.7%

And, the standard deviation is 0.033

Step-by-step explanation:

The computation of the mean and the standard deviation is as follows:

Let us assume the P be the sample proportion

Mean is 83.7%

And, the standard deviation is

= \sqrt{\frac{p(1-p)}{n} } \\\\=\sqrt{\frac{0.837(1-0.837)}{125} }

= 0.033

8 0
3 years ago
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