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3 years ago

Whats the answer to this eqaution

Mathematics

2 answers:

deff fn [24]3 years ago

5 0

the answer is c x+7/3

wel3 years ago

3 0

Answer:

yeah its x+7/3

Step-by-step explanation:

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18 times 9 then multiply 1/2??

lawyer [7]

Answer:

Step-by-step explanation:

18*9=162

162* $\frac{1}{2}$ =81

3 0

4 years ago

Read 2 more answers

Please give me the answer to 4 and 5 I’ll give Brainly

enot [183]

5 is d and idk question 5 sorry

6 0

3 years ago

Jorge le pregunta a su profesor de matemática Juan Carlos ¿Que parte de la semana es 14 horas?

kodGreya [7K]

Answer:

8.33 %

Step-by-step explanation:

How many hours are in one week? 24 x 7 = 168

14 x

----- = ------

168 100

1400 / 168 = 8.33

5 0

4 years ago

A factory is to be built on a lot measuring 210 ft by 280 ft. A local building code specifies that a lawn of uniform width and e

Tresset [83]

Answer:

Width of lawn = 35 ft

Dimensions of factory = length: 210 ft, width: 140 ft

Step-by-step explanation:

The total area of the lot can be calculated as:

$A_{lot} = 210 * 280\\A_{lot} = 58800 ft^{2}$

Since, the area of factory should be equal to area of lawn:

$A_{lot} = A_{factory} + A_{lawn}\\58800 = 2 A_{factory or lawn}\\\\A_{factory or lawn} = \frac{58800}{2}\\A_{factory or lawn} = 29400 ft^{2}$

Now, let 'x' be the width of lawn, the dimensions of factory can be written as:

$(210-2x)\\(280-2x)\\$

Since, area is equal to length x width:

$(210-2x)*(280-2x) = 29400\\Simplifying:\\210*280 - 210*2x - 2x*280 + 4x^{2} = 29400\\58800 - 420x - 560x +4x^{2} = 29400\\4x^{2} - 980x +58800 = 29400\\4x^{2} - 980x + 29400 = 0\\$

Divide whole equation by 4,

$x^{2} - 245 + 7350 = 0\\$

Solving above quadratic equation, we get,

$x = 210\\x = 35\\$

x = 35 seems realistic width of the lawn.

Now, finding the dimension of factory:

$(210-2x) = 210 - 2(35) = 140 ft\\(280-2x) = 280 - 2(35) = 210ft$

We can also reconfirm the area of factory by multiplying the above two lengths:

140 * 210 = 29400 ft

8 0

3 years ago

A store sells hardcover books for $8 and paperback books for $5. You buy 7 books, represented by the equation x+y=7, where is th

ollegr [7]

Answer:

Total number of Hardcover books is TWO while the number of Paperback books is FIVE

Step-by-step explanation:

No. of hardcover book = x

No. of paperback book = y

Cost of one hardcover book = $8

Cost of one paperback book = $5

We are given that:

x+y=7 (Equation 1)

8x+5y=41 (Equation 2)

We can find out value of x and y by solving both equations simultaneously.

$Multiplying Equation 1 by 5:\\5x+5y=35\\8x+5y=41\\Subtracting both equations\\-3x=-6\\x=2\\\\According to Equation 1:\\x+y=7\\Putting value of x=2\\2+y=7\\y=5$

Hence, Total number of Hardcover books is TWO while the number of Paperback books is FIVE

7 0

4 years ago