If x=2y+3 and 4x-5y=9, what is the value of y?

Answers

Answer 1

Answer:

The value of y for the given expression will be -1.

What is an expression?

Expression in maths is defined as the relation of numbers variables and functions by using mathematical signs like addition, subtraction, multiplication and division.

Solve the system by substitution.

x = 2y + 3

4x-5y = 9

Substituting the value of x in equation no. 2, we have,

4(2y+3) - 5y = 9

8y + 12 - 5y = 9

3y + 12 = 9

3y = 9-12 = -3

The value of y is calculated as,

3y = -3

y = -3/3 = -1

y = -1

To know more about an expression follow

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Answer 2

Answer: We solve the system by substitution.

x = 2y + 3
4x-5y = 9

Substituting the value of x in equation no. 2 , we have,

4(2y+3) - 5y = 9

8y + 12 - 5y = 9

3y + 12 = 9

3y = 9-12 = -3

thus, 3y = -3

thus, y = -3/3 = -1

thus, y = -1

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Regina owns 150 shares of a company’s stock. When the stock market opened, each share traded for $23.65. When the stock market closes, Regina will calculate how much money she gained or lost from the stock that day. How much can Regina reasonably expect her stock to be worth? Write an equation for the problem and then use the equation to answer the question.

Answers

Regina expect 150*$23.65=$3547.5
The sum of Regina's expect is $3547.5

150*23.65=3547.5

$3,547.50

Carla made a scale drawing of a classroom. The length of the classroom in the drawing is 5in. The actual length is 40ft. What scale did Carla use for her drawing?

Answers

Answer:

1/96

Step-by-step explanation:

scale is

a model cannot be as same size as that of actual object ,

hence objects are scales down to some value so that its model can be comfortably made.

scale is generally ratio of length of drawing and actual length of object

scale = length of drawing / actual length of object.

Given

length of classroom drawing = 5in

actual length of classroom = 40 ft

as unit of drawing and actual classroom is different lets make unit of class smilar to that of drawing that is in inches

we know

1 feet = 12 inches

thus 40 feet = 12*40 inches = 480 inches

thus,

actual length of classroom in inches = 480 inches

scale used by Carla = length of drawing / actual length of classroom

= 5 inches/480 inches = 1/96 (answer)

I feel so stupid, how do you change a fraction into a mix number???

Answers

Answer:

Divide the numerator by the denominator. Your answer would be the whole number, and the remainder would be your fraction.

I have also clipped a picture from fractionfun.com to make it more clear.

What is the square root of 392 between?

Answers

Answer:

The square root of 392 with one digit decimal accuracy is 19.7

Step-by-step explanation:

The square root of 392 is 19.7

Help nowwwww. Which equation represents a line that has a slope of 5 and passes through point (-2, 1)?

Answers

Answer:

y=1/3x+5/3

Step-by-step explanation:

cant be the other ones because the slope have to be more than 1

2x + 3y = 1
-x + 2y = -4

Answers

x=2 y=-1 what you do is you put them in y=mx+b form then you graph to find intercept.

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