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max2010maxim [7]
3 years ago
9

Leis car averages 14.5 miles per gallon while romans car averages 28.5 miles per gsllon.Use estimation to find how many times as

many miles per gallon romans carr gets compared to leis car
Mathematics
1 answer:
MissTica3 years ago
5 0

Answer:

  about 2 times as many

Step-by-step explanation:

Double 14.5 is 29, which is close to 28.5. Roman's car gets slightly less than 2 time as many miles per gallon as Lei's car.

___

If you like, you can take the estimate to the next level. The estimate of "2 times" is high by a factor of 29/28.5 or by 1 unit in 58. This is between 1.5% and 2% high, so a closer estimate is between 1.96 and 1.97 times as many.

__

The actual ratio is about 1.9655.

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Math To Do, Ready
xxTIMURxx [149]

Answer:

(probably) 96

Step-by-step explanation:

2 buildings, 3 floors, 16 windows.

first, 16x3=48

and then 48x2=96

So, the total number is 96.

3 0
3 years ago
The height of a triangle is 4 ft less than the base x. The area is 126 ft2. Find the dimensions of the triangle.
valina [46]

Answer:

Base = x = 18ft

Height = x - 4 = 14ft

Step-by-step explanation:

The formula for the area of A the triangle is given by the following equation:

1) A = (base * heigth)/(2)

From this problem, we know that

base = x and that the height is 4ft less than the base, so height = base - 4 = x - 4.

We also know that the area is 126ft², so A = 126 ft². Now we can replace these informations in equation 1).

126 = (x(x-4))/2

x² - 4x = 252

x² -4x - 252 = 0

The roots of this equation are x = 18 or x = -14. But we know that a triangle cannot have negative dimensions, so we use x = 18.

The base is x, so base = 18ft.

Height is 4ft less than the base, so height equals 18-4 = 14ft

7 0
3 years ago
A square has a side length of x inches. Each side of the square will be increased by 8 inches to create a larger square. If the
Norma-Jean [14]
X = 2

A square has 4 sides. To get the perimeter of a square, you could multiply the length of one side by 4.

One side of the larger triangle is x inches plus an additional 8 inches, which can be written as (x+8)

To get the perimeter of the larger square, multiply the expression (x+8) by 4. The question states the larger square’s perimeter is 40 inches.

You end up with this equation: 4(x + 8) = 40

To solve first distribution 4 into (x + 8).
4x + 32 = 40 | subtract 32 from both sides
4x = 8 | divide each side by 4
x = 2 inches

So the side length of the original square is 2 inches. To check your work, go back and plug x = 2 into the original equation. 8 in + 2 in = 10 inches, and 10 inches x 4 = 40 inches, so x = 2 is the solution
3 0
2 years ago
In the expression 2a-5+4a-9, name the constants​
Vika [28.1K]

Answer:

-5 and -9 are the constants, can also be written -14

4 0
2 years ago
Evaluate x/y for x equals 3/10 and y equals 4/5
Over [174]

Answer:

  x/y = 3/8

Step-by-step explanation:

y = 4/5 = 8/10, so ...

  x/y = (3/10)/(8/10) = 3/8

_____

One way to divide fractions is to make them have the same denominator. Then their ratio is the ratio of their numerators.

8 0
3 years ago
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