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Nostrana [21]
2 years ago
15

christa started her math homework at school after school she spent 4 more minutes on it altogether she spent 12 minutes on her h

omework how long did she work on the homework during class
Mathematics
1 answer:
dalvyx [7]2 years ago
7 0
8 because 12-4=8. Im writing this part for the 20 characters
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Find the equation of a straight line passing throught the point listed and having the given gradient. Express your answer in the
Igoryamba
First let's try to find the equation in this form : <span>y = mx + c 

The gradient is given 3 . In a line's equation, x's coefficient represents the line's gradient.

So equation of a line with the gradient of 3, would look like this ;

</span>y= 3x + c
<span>
Now a point that the line passes through is given, (1, 2) 

This point's x-coordinate is 1 and y-coordinate is 2.

So we'll plug its x-coordinate value in the equation and also y-coordinate value. So we can solve it.

As you know, </span>x=1 and y=2

y = 3x + c

2\quad =\quad 3\cdot 1+c\\ \\ 2\quad =\quad 3+c\\ \\ 2-3\quad =\quad c\\ \\ -1\quad =\quad c

We found c = -1 

Also in a line's equation, c is constant and it represents the line's y-intercept

So let's build the line's equation.

m=3 and c=-1

y= mx + c

y= 3x -1

We found the line's equation in this form, y= mx + c

Now let's turn it into this form, ax + by + c = 0

y\quad =\quad 3x-1\\ \\ y-3x\quad =\quad -1\\ \\ y-3x+1\quad =\quad 0\\ \\ -3x+y+1\quad =\quad 0

Final answers,

\boxed { y\quad =\quad 3x-1 }

and 

\boxed { -3x+y+1\quad =\quad 0 }

I hope this was clear enough :)




<span>


</span>
5 0
3 years ago
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Find the equation of the line.<br> Use exact numbers.
Virty [35]

Answer: https://api-project-1022638073839.appspot.com/questions/how-do-you-use-the-sum-or-difference-identity-to-find-the-exact-value-of-sin-255#582997

Step-by-step explanation:

this will help you.

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3 years ago
Write a variable expression to describe the rule for the sequence. Then find the 100th term in the sequence. –4, 1, 6, 11, 16, .
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Answer:

a+(n-1)d

Step-by-step explanation:

491

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3 years ago
Suppose a candidate for public office is favored by only 48% of the voters. if a sample survey randomly selects 2500 voters, the
Drupady [299]
Mean=0.48
standard deviation=0.01
thus using the z-score:
P(x>0.5) we shall have the following:
z=(0.5-0.48)/0.01=2
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3 years ago
What is the % of 7/10
Delicious77 [7]

7/10=70/100=70%, so the answer is seventy-percent.

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3 years ago
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