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3 years ago

Solve. 3/4 + ( 1/3 ÷ 1/6 ) - ( -1/2 ) = A. 3/4 B. 2 1/4 C. 1 3/4 D. 3 1/4

Mathematics

2 answers:

saveliy_v [14]3 years ago

8 0

The answer is D, 3 1/4

Mandarinka [93]3 years ago

3 0

Answer:

3.25

Step-by-step explanation:

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Galina-37 [17]

Answers:
The area for the square on the left is 81m^2. This is found because all sides of this square are the same, so the length and width are the same. Just multiply 9 x 9.

The area for the triangle is 31.5m^2. We find the left side is 9 meters because the triangle shares the same side as the square on the left side. We also find the bottom side is 7 because that is the length of each side of that square because all sides on a square is the same. We then multiply 9 times 7, getting 63, we divide this by 2 because it’s a triangle.

The square on the right has the area of 225 because both length and width is 15.

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3 years ago

If there are approximately 1.8 million cars in Vancouver and if each car travels an average of 17,500 kilometres in a year, how

Goryan [66]

Rates are used to measure a quantity over another.

The 1.8 million cars use $1.85 \times 10^{10}$ liters each year

Given

$Cars = 1.8\ million$

$d = 17500km$ --- distance

$r = 40miles/gallon$

First, we calculate the number (n) of gallons used by each car

$r = \frac{d}{n}$

Solve for n

$n = \frac{d}{r}$

So, we have:

$n = \frac{17500km}{40miles/gallon}$

$n = \frac{17500km}{40miles}gallon$

Convert miles to kilometers

$n = \frac{17500km}{40km \times 1.60934}gallon$

$n = \frac{17500km}{64.3738km}gallon$

$n = 271.85\ gallon$

The number of gallons (N), used by all the cars is:

$N = n \times cars$

$N = 271.85 \times 1.8\ million$

$N = 489330000$

Convert to liters

$N = 489330000 \times 3.78541L$

$N = 1852314675.3L$

In scientific notation to 2 decimal places, we have:

$N = 1.85 \times 10^{10}L$

Hence, the number of liters used is $1.85 \times 10^{10}$

Read more about distance and rates at:

brainly.com/question/24659604

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3 years ago

what is the ER of a cooling system that uses 500 watts of electricity to move 6000 BTUs per hour at 95 degrees Fahrenheit

Maru [420]

The EER of a cooling system is the ratio of BTUs per hour to watts.
.. EER = (6000 BTU/h)/(500 W)
.. EER = 12

6 0

3 years ago

3. What is the axis of symmetry of the graph of function f(x)=x^2 - 6x - 1

JulijaS [17]

Answer:

Hi! The answer to your question is $X = 3$

Step-by-step explanation:

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3 years ago

Find the value of each variable

aalyn [17]

Answer:

x = 12 $\sqrt{2}$

y = 12

z = 12 $\sqrt{3}$

Step-by-step explanation:

The triangle with z as one of it's sides is a 30, 60, 90 triangle where the longest side of the triangle is 2x, the shortest side as x, and the middle side as x*sqrt of 3.

The shared line between the two triangle is 12 and z is 12*sqrt of 3

The left triangle is a 45, 45, 90 triangle where the 2 sides that look the same are the same and the hypotenuse is x sqrt of 2 so y is 12 and x is 12 sqrt of 2

7 0

3 years ago

Read 2 more answers