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ratelena [41]
2 years ago
7

Which of the following would best be solved using completing the square?

Mathematics
1 answer:
Andrews [41]2 years ago
7 0

Answer:

2x^2 +15x = 6

Step-by-step explanation:

the form of this equation makes it easier to use the completing the square method

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The sum of the measures of the interior angles of a polygon is 1140. What kind of polygon is it ?
sukhopar [10]

Answer:

5) Regular decagon. 6) Yes.

Step-by-step explanation:

Number 6 is yes bc the interior angles of a triangle have to equal 180, and 1+2+177 equals 180.

5 0
2 years ago
Slope-intercept form of the equation for the line?
vaieri [72.5K]

Answer:

\large\boxed{y=-\dfrac{3}{10}x+\dfrac{1}{2}}

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y=mx+b

m - slope

b - y-intercept

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points from the graph (-5, 2) and (5, -1).

Substitute:

m=\dfrac{-1-2}{5-(-5)}=\dfrac{-3}{10}=-\dfrac{3}{10}

We have the equation in form:

y=-\dfrac{3}{10}x+b

Put the coordinates of the point (5, -1) to the equation:

-1=-\dfrac{3}{10}(5)+b

-1=-\dfrac{3}{2}+b

-\dfrac{2}{2}=-\dfrac{3}{2}+b            <em>add 3/2 to both sides</em>

\dfrac{1}{2}=b\to b=\dfrac{1}{2}

4 0
3 years ago
Which equation has a constant of proportionality equal to 1/2
Olin [163]
The equation is Oy = 3/6x
5 0
3 years ago
The perimeter of a rectangular fence is to be at least 120 feet and no more than 168 feet. If the length of the fence is to be t
Shkiper50 [21]
A rectangle has a perimeter of length + length + width + width.

L = length of the fence.

W = width of the fence.

so the perimeter will be L+L+W+W or 2L+2W or 2(L+W).

now, we know that 120 ⩽ 2(L+W).

we also know that 168 ⩾ 2(L+W)

and we also know that whatever the length is, is twice the width, or L = 2W.

\bf 120\le 2(L+W)\implies 120\le 2(2W+W)\implies 120\le 2(3W)&#10;\\\\\\&#10;120\le 6W\implies \cfrac{120}{6}\le W\implies \boxed{20\le W}\\\\&#10;-------------------------------\\\\&#10;168\ge 2(L+W)\implies 168\ge 2(2W+W)\implies 168\ge 2(3W)&#10;\\\\\\&#10;168\ge 6W\implies \cfrac{168}{6}\ge W\implies \boxed{28\ge W}\\\\&#10;-------------------------------\\\\&#10;20\le W \le 28
6 0
3 years ago
Pls help me with them I will give brainilist
hammer [34]

Answer:

All integers are rational numbers .

Step-by-step explanation:

please mark as branliest

6 0
2 years ago
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