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nikklg [1K]
3 years ago
10

It 3x - 2 = 7, then 3x = 9 is an example of the ?

Mathematics
1 answer:
vova2212 [387]3 years ago
3 0

Answer:

Addition Property of Equality

Step-by-step explanation:

So we had:

3x-2=7

And then we got:

3x=9

We did this by adding 2 to both sides of the equation. When we added 2, the left side cancelled and the right side equated to 9:

(3x-2)+2=(7)+2\\3x=9

Since we added 2 to both sides, this is an example of the addition property of equality.

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A farmer is going to divide her 30 acre farm between two crops. Seed for corn costs $15 per acre. Seed for wheat costs $30 per a
Deffense [45]

Answer:

$3200

Step-by-step explanation:

The total area of land is 30 acre. Let x represent the area in acre that corn is planted and y represent the area in acre that wheat is planted. Therefore:

x + y = 30               (1)

Also, the farmer can spend at most $750 on seeds. Corn cost $15 per acre, maize cost $30 per acre. Hence:

15x + 30y ≤ 750      (2)

Also, x and y > 0

The profit is given by the function:

Profit = 100x + 110y

Graphing equation 1 and equation 2 and solving, we get the points:

(10, 20)

Hence the maximum profit is at:

Max profit = 100(10) + 110(20) = $3200

8 0
3 years ago
Which could be the dimensions of a rectangular prism whose surface area is less than 160 square feet? Select two options
Hunter-Best [27]

Answer:

8 4 3 and 7 6 4 my chat is devanson1

5 0
3 years ago
World war 1 lasted from August 4th 1914 until November 11th, 1918. During this time an estimated 10 million lives were lost. Abo
Kryger [21]
The question is so dry, mechanical, and devoid of emotion
that it's terrifying.

There is no way to assign a number to "How many people were
dying per day", and I would prefer not even to think about it in
those terms.

-- The period of time from August 4, 1914 until November 11, 1918 is 1,560 days.

-- The "average", or better, the "unit rate" of 10 million events in 1,560 days
is the quotient

                   (10,000,000 events) / (1,560 days) 

               =  6,410.3 events per day

               =     267.1 events per hour

               =       4.45 events per minute.


Reciprocally, this is a unit rate of 

                  13.48 seconds per event,
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When will we ever learn ! ?
6 0
3 years ago
Anyone trying to help a girl out?
adoni [48]

Answer:

so it is a rectangle with a perimeter of 30 units

3 0
3 years ago
Line x and line z are straight lines.
sashaice [31]

Answer:

\angle c and \angle e

Step-by-step explanation:

Given

See attachment

Required

Identify the vertical angles

Keynotes

  • Vertical angles opposite one another
  • Vertical angles are equal to one another

Using the keynote as a reference, we have the following observation from the attachment:

\angle c and \angle e are opposite

\angle c and \angle e are congruent

Hence:

\angle c and \angle e are vertical

<em>(d) is correct</em>

3 0
3 years ago
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