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tatyana61 [14]
3 years ago
15

first car consumed 35 gallons of gas the second one consumed 15 gallons of gas. the combined total was 1825 miles. the sum of th

eir eggicenieewas 75 miles per gallon. what were the efficiencies of each car​
Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
3 0

Answer:

use energy effience method

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X=y+2
Andreas93 [3]

Answer:

4=8 908575939835

Step-by-step explanation:

lol

8 0
3 years ago
A guy wire 30 ft long supports an antenna at a point that is 24 ft above the base of the antenna.
GalinKa [24]
Use Pythagorean Theorem
c2 = a2 + b2
152 = a2 + 12
a2 = 152 - 122
=225 - 144 = 81
a = 9 ft
Distance from base of antenna = 9ft
4 0
2 years ago
Please help i give brainlist
Anastasy [175]
Hello There!

The ratio is 1:3 therefore the answer is 1/3

Hope This Helps You!
Good Luck :) 

- Hannah ❤
3 0
3 years ago
Read 2 more answers
How to find the perimeter of a parallelogram
jonny [76]
Perimeter is the sum of all the sides of the shape

do you know the length of each side of the parallelogram?

4 0
2 years ago
Read 2 more answers
A recent survey based on a random sample of n=470 voters, predicted that independent candidate for the mayoral election will get
julsineya [31]

I have an expression

\sigma = \sqrt{p(1-p)/n}

floating around in my head; let's see if it makes sense.

The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is

E( (b-p)^2 ) =  (-p)^2(1-p) + (1-p)^2p = p(1-p)

That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:

\sigma = \sqrt{p(1-p)/n}

Plugging in the numbers,

\sigma = \sqrt{.24(1-.24)/490} = 0.019 = 1.9\%

One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.

So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.

7 0
3 years ago
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