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Mashcka [7]
3 years ago
8

which ordered pairs are a solution to the equation? y=2×-3 select all that apply (4,2) (1,-1) (-1,-7) (2,1)​

Mathematics
1 answer:
kirill [66]3 years ago
3 0

To check if a point, such as (1, -1), is on your line, you can either sub in both the x and y values of each point into your line's equation, or one and check if the other matches up with your point.

For example, the x value of (1, -1) is 1, and the y value is -1. Sub these points into your equation:

y = 2x - 3 Original equation

(-1) = 2(1) - 3 Sub in points

-1 = 2 - 3

-1 = -1 Sides equal, therefore point is on line

If a point is NOT on the line:

y = 2x - 3 Original equation

(2) = 2(4) - 3 Sub in points

2 = 8 - 3

2 = 5 Sides do NOT equal, point is NOT on line, NOT a solution

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Factor completely 4x5 − 20x4 − 36x3.
lakkis [162]

Answer:

the 2nd one is the answer :)

8 0
3 years ago
A farmer has 23 acres on his horse farm. He wants to have at least 1.8 acres for each horse for proper grazing. How can he deter
White raven [17]

Step-by-step explanation:

you would multiply 1.8 acres times 12 horses than take your answer is it more or less than how many acres this farmer has. btw that is not a lot of acres for a farm...

8 0
2 years ago
Can someone help me with this ? Thanks
olasank [31]

Answer:

Type of angle - Obtuse

Key information - 180° - 82° = 98° (missing angle)

Equation - (5y+12)=98 y=17.2

Step-by-step explanation:

Let's solve for the missing angle first! 180° - 82° = 98°. 180 represents the total among the angles so we use 180 degrees.

then use the statement to solve for y and make it equal to 98°

(5y+12)=98

(5y-12)  = -12          subtract 12 from both sides

(5y)           =  86        Now solve for y by dividing 86 ÷ 5

y = 17.2                      

5 0
3 years ago
Read 2 more answers
2x + 5 = 10<br> What is the first operation used in solving this equation.
AleksAgata [21]
Subtract the five from the ten
7 0
3 years ago
The number of days each licensed driver in Marion County uses a commuter rail line annually is normally distributed with mean 66
alexira [117]

Answer:

31.5 days

Step-by-step explanation:

We.solve using z score formula

z-score is is z = (x-μ)/σ,

where x is the raw score

μ is the population mean

σ is the population standard deviation.

The 5th percentile z score = -1.645

Mean = 66

Standard deviation = 21

Hence:

-1.645 = x - 66/21

-1.645 × 21 = x - 66

-34.545 = x - 66

-34.545 + 66 = x

x = 31.455 days

Approximately to the nearest round integer

= 31.5 days

Therefore, driver use a commuter rail line 31.5 days annually to be in the top 5% of rail users

3 0
3 years ago
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