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2 years ago

Please help! thank you

Mathematics

2 answers:

scoray [572]2 years ago

8 0

(-3/7)x+3=y
Because the y intercept on the graph is 3
And when x is 1 y is 2.5

OLga [1]2 years ago

3 0

9514 1404 393

Answer:

y = (-7/3)x +3

Step-by-step explanation:

The line has a negative slope (eliminating choices B and C) that is steeper than a line with a slope of -1, The only answer choice with a negative slope less than -1 is choice D.

The slope is the coefficient of x. It is "rise"/"run". Here, the line goes through grid points (0, 3) and (3, -4), so drops 7 units (rise=-7) for each 3 units to the right (run=3). Then the slope is rise/run = -7/3.

The line crosses the y-axis at y=3, so the slope-intercept equation is ...

y = mx + b . . . . . . . . slope = m; y-intercept = b

y = (-7/3)x +3

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Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation o

Ad libitum [116K]

The probability will be found as follows:
z-score is given by:
z=(x-μ)/σ
where:
mean-μ=9.3
standard deviation-σ=1.1
but
σ/√n=1.1/√70=0.1315
thus the z-score will be:
z=(9.1-9.3)/0.1315
z=-1.5209
thus:
P(x<9.1)=P(z<-1.5209)=0.0643

7 0

3 years ago

Select the correct answer from each drop-down menu. The general form of the equation of a circle is 7x2 + 7y2 − 28x + 42y − 35 =

nignag [31]

The general form of the equation of a circle is,

x² + y² + Dx + Ey + F = 0, where D, E, F are constants.

The given equation is 7x² + 7y² − 28x + 42y − 35 = 0. So, to convert this equation into a general form we just need to get rid of the leading coefficient 7.

Hence, divide both sides of the equation by 7. So,

$\frac{7x^2+ 7y^2-28x + 42y-35}{7} =0$

x² + y² − 4x + 6y − 5=0.

So, the general form of the equation is x² + y² − 4x + 6y − 5=0.

7 0

2 years ago

Dwayne has a wrench set with the socket sizes of 1, 1/2, 1/4, 1/8, 1/16 what would the next size be?

lukranit [14]

Notice that the denominator is a multiplied by 2 for each fraction.

1/1•2 = 1/2

1 /2•2 = 1/4

1/4•2 = 1/8

1/8•2 = 1/16

1/16•2 =1/32

The next size is 1/32.

8 0

2 years ago

Can someone help me with number 4,5 and 6?

True [87]

4) You know slope-intercept form is y=mx+b. So using these two given points, you can find the slope!

(-8,5) (-3,10) [Use the y1-y2 over x1-x2 formula to solve for slope]

10 - 5 5
--------- = ----- = 1
-3-(-8) 5

Hurray! You got a slope of one. Now substitute this back into your original equation:
y=mx+b --> y=1x+b

Next, we find what our "b" is, or what our y-intercept is:
Using one of the previous points given, substitute them into the new equation:
[I used the point (-3, 10) ]

y=1x+b
10=1(-3)+b SUBSTITUTE
10=-3+b MULTIPLY
10=-3+b
+3 +3 ADD
----------
13=b SIMPLIFY

So, now we have our y-intercept. Use this and plug it into the equation:
y=1x+b --> y=1x+13

y=1x+13 is our final answer.

5) So for perpendicular lines, your slope will be the opposite reciprocal of the original slope. (Ex: Slope is 2, but perpendicular slope is -1/2)

We have the equation y= 3x-1, so find the reciprocal slope!
--> y=-1/3x-1

Good! Now we take our given point, (9, -4) and plug it into the new equation:

y=-1/3x-1
-4=-1/3(9)+b SUBSTITUTE and revert "-1" to "b", for we are trying to find the y- -4=-3+b intercept of our perpendicular equation.
+3 +3 ADD
--------
-1=b SIMPLIFY

So, our final answer is y=-1/3x+(-1)

6) I don't know, sorry! :(

4 0

3 years ago

Help<br> Me ? I’m marking brainlist

dsp73

Answer: I belive the answer is C

Step-by-step explanation:

7 0

2 years ago

Please help! thank you​

Please help! thank you