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Svetlanka [38]
3 years ago
13

Which is not an equation of the line going through (3, 6) and (1, –2)?

Mathematics
2 answers:
bekas [8.4K]3 years ago
8 0
Answer is <span>D. y – 2 = 4(x + 1)

</span><span>not an equation of the line going through (3, 6) and (1, –2)? 
...............................................</span>
BARSIC [14]3 years ago
3 0
To solve this, find your slope-intercept equation, then convert to point-slope. y=mx+b, m=(y2-y1)/(x2-x1)=(6+2)/(3-1)=4, y=4x+b, b=y-4x=6-4(3)=-6, y=4x-6. This eliminates A. Next, convert to point-slope, y-y1=m(x-x1), This gives you y-y1=4(x-x1). Using your two points, you can get y-6=4(x-3) and y+2=4(x-1) as possible equations, which eliminates B and C, meaning your answer is D.
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One antifreeze solution is 20% alcohol. Another antifreeze solution is 12% alcohol. How many liters of each solution should be c
katrin [286]
Use this systems of equations to solve:

x = first antifreeze
y = second antifreeze

\left \{ {{.2x + .12y = .18(15)} \atop {x + y = 15}} \right.

Isolate y.

x + y = 15
Subtract x from both sides.
y = -x + 15

Substitute y into the other equation.

.2x + .12(-x + 15) = .18(15)
Simplify.
.2x - .12x + 1.8 = 2.7
Subtract 1.8 from both sides.
.08x = .9
Divide both sides by .08
x = 11.25

Substitute x in the equation that we isolated y in.

y = -11.25 + 15
y = 3.75

11.25 L of the first antifreeze and 3.75 L of the second.
5 0
2 years ago
Find the slope of the line perpendicular to the given line.<br> y=-3/5x+1
Artyom0805 [142]

Answer: y= 3/5x+1

Step-by-step explanation: if you want to check if its perpendicular go on Desmos graphing calculator on goolge and plug both equations:)

5 0
3 years ago
Answer ASAP!! Please! Will give brainliest!
ale4655 [162]
This is what you’re looking for !

7 0
2 years ago
1) Find an equation of the line that passes through thr pair of points (-5,-9) and (2,-7).
Yuki888 [10]
1: Assuming this line is linear, the first thing to do is find the slope. 
The slope formula is m=\frac{ y_{2} - y_{1} }{ x_{2} - x_{1} }, so in this case, it is m=\frac{ (-7) - (-9) }{ 2 - (-5) }, which comes to \frac{2}{7}. Then, use your slope and one of the points given to write the point-slope formula of the linear equation, and then written in standard form:
y=\frac{2}{7}x-\frac{53}{7}.

2. Use the same process as in question 1 to find:
y=-7x+11


8 0
3 years ago
Find the value of f(x) = -3x +2 <br> When x=2
Liono4ka [1.6K]

Answer:

it is -4

Step-by-step explanation:

-3 * 2 = -6 + 2 = -4

5 0
2 years ago
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