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3 years ago

Math questions 40 and 41!!

Mathematics

1 answer:

DerKrebs [107]3 years ago

8 0

The first expression could be written as 3x + 12 and the second could be written as 2x + 6.

In order to find these, count the number of x's you see in each question. Then use that number as the coefficient to x in your statement. The first problem has 3 and the second has 2.

Then add the numbers of 1's together to get the constants at the end of the expressions. The first has 12 and the second has 6.

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How to make this a simultaneous equation?

andriy [413]

Hello,

I suppose equations are:

x+y=3 (1)
x+2y=9 (2)

(2)-(1)==>y=6
(1)==>x=3-6

x=-3, y=6
Sol={(-3,6)}

7 0

3 years ago

Which is a y-intercept of the graphed function

dybincka [34]

Answer:

$\displaystyle (0, -9) \\ (0, -3)$

Step-by-step explanation:

There is no graph posted, but y-intercepts are <em>x</em>'s are set equal to zero.

I am joyous to assist you anytime.

4 0

3 years ago

Please help me with this math problem

astraxan [27]

Answer:

E. y = 2/3x

Step-by-step explanation:

You need to make an equation in slope-intercept form.

First, you need to find the slope. You can do this by taking two points and dividing the difference of the y's by the difference of the x's. I will use the first two points, but you can pick whichever points you want and still get the right answer. Also, the values in the left column will be x's, and the values in the right column will be y's.

8 - 2 = 6

12 - 3 = 9

6/9 = 2/3

The slope is 2/3. The only equation with this value is E.

6 0

3 years ago

Sarah hired a painter to paint her bedroom walls and ceiling. Each of the four bedroom walls is 18 ft. Long and 8 ft. High. Two

Dovator [93]

Answer:

The estimate is not correct?

Step-by-step explanation:

Given data

Area of wall = 18*8

=144ft^2

=4*144

=576ft^2

Area of doors

=3*7

=21ft^2

=2*21

=42ft^2

Area of window

=3*5

=15ft^2

Hence the total surface area of the room

=576-42-15

=519ft^2

The amount of paint needed= 519/300= 1.73

Approximately 2 gallons

We are told that 1 gallon will cover 300ft^2

Hence 3 gallons will cover 300*3= 900ft^2

Therefore the painter overestimated the amount of paint needed

As 2 gallons will do the job

6 0

2 years ago

What is 100,000 to the 10th power.

oee [108]

Answer:

100,000^10 = 10^50 = 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

Step-by-step explanation:

100,000^10 = (10^5)^10 = 10^(5 * 10) = 10^50

The answer is a very large number number which is 1 followed by 50 zeros.

100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

6 0

3 years ago