1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AnnZ [28]
3 years ago
6

Q12.

Mathematics
1 answer:
SVEN [57.7K]3 years ago
6 0

Answer:

Step-by-step explanation:

1l ........8.5 miles

x l .......6 miles

-----------------------

x=6*1/8.5

x=0.70 l

2*0.7=1.4 l petrol/day ( to work and come back home)

5*1.4=7 l/week ( 5 days works in a week)

7*1.26=8.82 L /week

8.82>8.5

The petrol costs more

So the answer is NO

You might be interested in
Bob's truck averages 23 miles per gallon. If Bob is driving to his mother's house, 72 miles away, how many gallons of gas are ne
anyanavicka [17]

Answer:

3.1 gallons

Step-by-step explanation:

To solve this, we need to figure out how many gallons of gas go into 72 miles. We know 23 miles is equal to one gallon of gas, and given that the ratio of miles to gas stays the same, we can say that

miles of gas / gallons = miles of gas / gallons

23 miles / 1 gallon = 72 miles / gallons needed to go to Bob's mother's house

If we write the gallons needed to go to Bob's mother's house as g, we can say

23 miles / 1 gallon = 72 miles/g

multiply both sides by 1 gallon to remove a denominator

23 miles = 72 miles * 1 gallon /g

multiply both sides by g to remove the other denominator

23 miles * g = 72 miles * 1 gallon

divide both sides by 23 miles to isolate the g

g = 72 miles * 1 gallon/23 miles

= 72 / 23 gallons

≈ 3.1 gallons

4 0
2 years ago
Many traffic experts argue that the most important factor in accidents is not the average speed of cars but the amount of variat
yan [13]

Answer and Step-by-step explanation: Standard Deviation is the measure of how diferent a number is from the mean of the data set. It is the spread of a data set. To calculate it manually:

1) Find the mean of the data set. Mean, represented by μ, is the sum of all the values divided by the total number of elements forming the set;

2) Subtract each number with the Mean and square the result;

3) Add the differences and divide it by the total number of elements of the set;

4) Take the square root of the result and that is the <u>Standard</u> <u>Deviation.</u>

The calculations can be done by a calculator like Excel:

1) In each cell of a same column, write the data you want to know the deviation.

2) On the last cell, write: =stdev.p(A1:A10) or =stdev.s(A1:A10).

3) Press Enter. The deviation will appeared on the same cell.

The function STDEV.P is used when the data represents the entire population, whereas STDEV.S is used when the data is for a sample of the population. Inside the parenthesis, put the cells where your data is. For example, if you put your data in the column A, from cell 1 to cell 10, you write like it's written above.

6 0
3 years ago
Find the perimeter and area of the polygon shown below
dusya [7]

Perimeter = 80ft

Area = 368

5 0
2 years ago
What are the real square roots of .0625
Andreas93 [3]

Assuming you can't simply put the number inside a calculator: write the number as a fraction:


0.0625 = \frac{625}{10000}


Find the prime factorization both numerator and denominator:


\frac{625}{10000} = \frac{5^4}{2^45^4}


The square root halves the exponents, so the number becomes


\sqrt{\frac{625}{10000}} = \frac{5^2}{2^25^2} = \frac{25}{100} = 0.25

5 0
2 years ago
Completing the square: x^2+2x-7=8x
tia_tia [17]

Answer: x = 7, x = -1

Step-by-step explanation: Move the term to the left side

x^2 + 2x - 7 = 8x

x^2 + 2x - 7 - 8x = 0

Combine like terms

x^2 + 2x - 7 - 8x = 0

x^2 - 6x - 7 = 0

x^2 - 6x - 7 = 0

a = 1

b = -6

c = -7

x = -(-6) + (-6)^2 - 4 x 1(-7)/ 2 x 1

Evaulate the Exponent

Multiply the numbers

Add the numbers

Evaluate the square root

Multiply the numbers x = 6 ± 8/2

To solve for the unknown variable, separate into two equations: one with a plus and the other with a minus.

x = 6 + 8/2

x = 6 - 8/2

Rearrange and isolate the variable to find each solution

x = 7

x = -1

4 0
2 years ago
Other questions:
  • adria is putting down floor tiles in her kitchen.each tile has an area of 1 square foot. Twelve square feet of tile costs $7. ad
    6·1 answer
  • Simplify the following expressions. All answers should be in standard form.
    15·1 answer
  • If g(x) = -2x - 2, find g(-2x).​
    6·1 answer
  • During a company's first full year in business, the price of oil increased $50. In the second year of business, the price of oil
    5·1 answer
  • Please help with this question. Quick! 20 points!
    5·1 answer
  • An angle is inscribed in the circle as shown.
    14·1 answer
  • Pls help me I need to pass
    8·1 answer
  • Find the slope of a line perpendicular to each given line.<br> y = 1/4x - 4
    7·1 answer
  • Please answer NO LINKS
    6·2 answers
  • 8,128 in expanded form no spaces
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!