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3 years ago

Help.................

Mathematics

1 answer:

Bad White [126]3 years ago

7 0

Answer:

x=120 degrees

Step-by-step explanation:

Vertical angles are congruent

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Suzanne bought a sweater at the sale price of $25. The original cost of the sweater was $40. What percent represents that discou

Blizzard [7]

15/40 x 100 = 37.5
equation for percent decrease is diiference/original x 100.

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3 years ago

A piece of stained glass in a shape of a right triangle has side measuring 8 centimeters 15 centimeters and 17 centimeters. What

Umnica [9.8K]

60<span>cm²
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3 years ago

HELP ASAP HELP PLEASE ASAP

Gnesinka [82]

Answer:

WXYZ can not be a rectangle because consecutive sides are not perpendicular to each other.

Step-by-step explanation:

The given vertices are W(-4,3), X(1,5), Y(3,1) and Z(-2,-1).

Plot these points on coordinate plane and draw the quadrilateral as shown below.

$Slope=\dfrac{y_2-y_1}{x_2-x_1}$

Using this formula, we get

$m_{WX}=\dfrac{5-3}{1-(-4)}=\dfrac{2}{5}$

$m_{XY}=\dfrac{1-5}{3-1}=\dfrac{-4}{2}=-2$

Now,

$m_{WX}\times =\dfrac{2}{5}\times (-2)=-\dfrac{4}{5}\neq -1$

Here, WX and XY are two consecutive sides of quadrilateral but the product of their slopes is not equal to -1. It means they are not perpendicular to each other.

Since, all interior angles of a rectangle are right angles, therefore, WXYZ can not be a rectangle.

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3 years ago

What decimal is equivalent to 122/11?<br />do u divide 11 into 122 ?

Sav [38]

122/11....u divide 122 by 11...or how many times does 11 go into 122.
122/11 = 11.09 with a line over the 09 because it is repeating

8 0

3 years ago

the vertex of this parabola is (2,-1). When the x-value is 5 the y-value is 0.what is the coefficient of the squared expression

weeeeeb [17]

1/9
Here's the proper explanation:
Since the vertex is (2,-1), the original equation will look like this: y=a*(x-2)^2-1
When the substitution happens we get to this:
0=a*(5-2)^2-1 then 1=a*(5-2)^2 -> 1=a*9
So, a=1/9! Written in another form:
1/9x^2-4/9x+4/9-1

Hope could help :)

8 0

3 years ago