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3 years ago

Anyone know the correct answer to this?

Mathematics

2 answers:

Svetllana [295]3 years ago

4 0

Answer:

It should be y=4x-7

Step-by-step explanation:

M is the slope meaning Δx over Δy or rise over run

So if you look at (2,2) and count up to (3,6) the rise is 4 and the run is 1 meaning the slope is 4.

B is the y- intercept so then it would just be -7.

Svetlanka [38]3 years ago

3 0

9514 1404 393Answer:

y=4x-6

Step-by-step explanation:

The line intersects the y-axis at y=-6, so that is the value of 'b' in the slope-intercept form.

The horizontal difference between marked points is 1 unit; the vertical difference is 4 units. That means the slope is . . .

m = rise/run = 4/1 = 4

Filling in these values (m=4, b=-6), we get ...

y = 4x -6

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Substitution method <br><br> x-7y=-9<br> -x+8y=10

max2010maxim [7]

Answer:

x = -2, y=1

Step-by-step explanation:

x-7y=-9---------------------equation 1

-x+8y=10-------------------equation 2

From equation 1, make x the subject of formula

x=7y-9----------------------equation 3

substituting x=7y-9 in equation 2,

-(7y-9)+8y=10

Expanding bracket

-7y+9+8y=10

Collecting like terms

8y-7y=10-9

y=1

substituting y=1 in 3

x=7(1)-9

x=7-9

x=-2

7 0

3 years ago

Carlos is using the quadratic formula to find the solutions of y=3x^2-5x-2. Which of the following will simplify to the correct

Nana76 [90]

Answer:

$Fx=\frac{5\pm\sqrt{25+24} }{6}$

Step-by-step explanation:

A quadratic equation in one variable given by the general expression:

$ax^2+bx+c$

Where:

$a\neq 0$

The roots of this equation can be found using the quadratic formula, which is given by:

$x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

So:

$y(x)=3x^2-5x-2=0$

As you can see, in this case:

$a=3\\b=-5\\c=-2$

Using the quadratic formula:

$x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}=\frac{-(-5)\pm\sqrt{(-5)^2-4(3)(-2)} }{2(3)}=\frac{5\pm\sqrt{25+24} }{6}$

Therefore, the answer is:

$Fx=\frac{5\pm\sqrt{25+24} }{6}$

4 0

3 years ago

The equation 3.5x + 1.5y = 21 represents the cost for a family to

Alexus [3.1K]

Answer:

Hey there!

The x-intercept is (6,0) meaning that if no children attend, 6 adults will attend.

The y-intercept is (0,14) meaning that if no adults attend, 14 children will attend.

Let me know if this helps :)

7 0

3 years ago

The slope of a line AB = −4. What is the value of x if A = (−5,3) and B = (x,−21).

ohaa [14]

The slope is -24/(x+5)

7 0

3 years ago

There are approximately 1.2×10 to the eighth household in the US if the average household uses 400 gallons of water each day wha

lana [24]

Answer:

$Total = 4.8 * 10^{10}$

Step-by-step explanation:

Given

$h = 1.2 * 10^8$ --- households

$g = 400$ --- gallons

Required

The number of households

To do this, we simply multiply the average households by the gallons.

$Total = g* h$

$Total = 400 * 1.2 * 10^8$

$Total = 480 * 10^8$

Rewrite as:

$Total = 4.8 * 10^2 * 10^8$

$Total = 4.8 * 10^{10}$

7 0

3 years ago