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Over [174]
2 years ago
9

Which expression is equivalent to (7x3)" (28)?

Mathematics
1 answer:
Fiesta28 [93]2 years ago
3 0

Answer:

(7*28)3

Step-by-step explanation:

it is that because 7*28 is 194*3 is 588

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onyango wishes to fence a rectangular research plot using 100 m of wire .one end of the plot has a wall already erected .calcula
earnstyle [38]

Answer:

1250 m²

Step-by-step explanation:

Let x and y denote the sides of the rectangular research plot.

Thus, area is;

A = xy

Now, we are told that end of the plot already has an erected wall. This means we are left with 3 sides to work with.

Thus, if y is the erected wall, and we are using 100m wire for the remaining sides, it means;

2x + y = 100

Thus, y = 100 - 2x

Since A = xy

We have; A = x(100 - 2x)

A = 100x - 2x²

At maximum area, dA/dx = 0.thus;

dA/dx = 100 - 4x

-4x + 100 = 0

4x = 100

x = 100/4

x = 25

Let's confirm if it is maximum from d²A/dx²

d²A/dx² = -4. This is less than 0 and thus it's maximum.

Let's plug in 25 for x in the area equation;

A_max = 25(100 - 2(25))

A_max = 1250 m²

5 0
3 years ago
SHOW ALL WORK: Graph each lineby plotting its intercepts or by using the y intercept and slope. {2x-y=4 {3y-3x=6
pickupchik [31]

Answer:

x-y=-2

Step-by-step explanation:

Divide both sides if the equations by 3.

(3y-3x)÷3=6÷3

y-3x÷3=2

calculate the quotient

y-x=2

multiply both sides of the equation bub -1

-1x(-x)-1y=-1x2

any expression multiplied by -1

x-1y=-1x2

any expression multiplied by 1 remains the same.

x--y=-1x2

x-y=-2

5 0
3 years ago
1 point<br> 9) A 12-foot long sub sandwich is cut into 7 equal pieces. How long is each<br> piece? *
Makovka662 [10]

Answer:

20 4/7 inches

Step-by-step explanation:

Take 12 feet and convert to inches

1 ft = 12 inches

12 * 12 = 144 inches

Divide by 7

144/7 =20 with 4 left over

20 4/7 inches

5 0
3 years ago
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What will it cost to carpet a rectangular floor measuring 12 feet by 15 feet if the carpet costs $ 31.65 per square​ yard?
kaheart [24]

Answer:

$633

Step-by-step explanation:

You multiply the 12x15 feet by 31.65

8 0
3 years ago
In Chicago, IL, the average wind speed is 10.4 miles per hour. In Great Falls, MT, the average wind speed is 13.1 miles per hour
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I think Great Falls' average wind speed is greater than Chicago's by 2.7 miles
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