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3 years ago

Help plz I don't understand

Mathematics

1 answer:

IrinaVladis [17]3 years ago

7 0

Answer:

(-9,-3.4)

Step-by-step explanation:

By adding 2.1x and subtracting 5.3 from the top equation, it will end up as 2.1x=4y-5.3

By adding 5.5y to the bottom equation, it will end up as 2.1x=5.5y-0.2.

By the equal valuesmethod, they are equal: 5.5y-0.2=4y-5.3

5.5y+5.1=4y

5.1=-1.5y

y=-3.4; this gets us our y-coordinate.

To get the x-coordinate, you plug the value for y back into the original equation.

-2.1x-4y=5.3

-2.1x-4(-3.4)=5.3

-2.1x-13.6=5.3

-2.1x=18.9

x=-9

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Lil help and hand here

antoniya [11.8K]

Well all you need to do to write the linear equation for this function. I assume you want to know, is that you must obtain 2 points, and calculate the slope, then place the info within the following form.

Y = mx + b
1 of the points has to be the y intercept, which can be obtained from the graph, and the other, any other point, which can also be the X intercept.

So, X intercept - (2,0)
Y intercept - (0,3).

Slope = y/X = 3-0/0-2
Slope = 3/-2 or -3/2.

Now put everything together in form:

Y = mx + b

Y = -3/2x + 3.

I believe this is the solution.

8 0

3 years ago

Read 2 more answers

The manager of the toy store at the mall is curious about why nobody is buying the new robot toys. He's very annoyed because he

marin [14]

Answer: B

Step-by-step explanation: I believe it's B because if you're able to get the opinions of others about your store. You'll be able to see whats the customers are more interested in, so therefore be able to supply your store with stuff people are more intrigued in. (Let me know if I'm wrong, have a good day)

6 0

4 years ago

3x-y=-5 x=2y+5 y=3/4x - 2 y=-2/3x - 2

arsen [322]

Idont under stand this thanks

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3 years ago

Question 7 )

soldier1979 [14.2K]

Answer:

Tony has 45 dollars

Milan has 15 dollars

Lucy has 25 dollars

Explanation:

Let x represent the amount of money Milan has in his wallet.

TONY: 3x

MILAN: x

LUCY: x+10

Lucy, Milan, and Tony have a total of $85 in their wallets. Hence, the following equation.

3x+x+x+10=85

5x+10=85

5x=75

x=75/5

x=15

Tony has 45 dollars (3*15=45)

Milan has 15 dollars (x=15)

Lucy has 25 dollars (10+15=25)

7 0

3 years ago

the area of the triangle below is 1/4 square meters. what is the length of the base. express your answer in simplest form

Alexeev081 [22]

Answer:

4/5

Step-by-step explanation:

Given,

Area of the triangle = 1/4 square meters

From the diagram,

Height = 2/5 m

To find : Length of the base

Formula : -

A = bh/2

Here,

A denotes Area

b denotes Base

h denotes Height

A = 1/4

h = 2/5

A = bh/2

Cross multiply,

A * 2 = bh

2A = bh

2 * (1/4) = b * (2/5)

(1 * 2)/4 = (b * 2)/5

2/4 = 2b/5

1/2 = 2b/5

Cross multiply,

1 * 5 = 2 * 2b

5 = 4b

b = 4/5 meters

Hence,

The length of the base is 4/5 meters.

5 0

2 years ago