3 angles of a quadrilateral measure 25 degree and 40 degree and 90 degree wwhat is the measure of the 4th angel

Mathematics

1 answer:

myrzilka [38]3 years ago

6 0

A quadrilateral has 4 sides and 4 angle.

The sum of the 4 angles need to equal 360 degrees.

4th angle = 360 - 25-40-90

4th angle = 205 degrees.

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Number 15. Find the equation of the line that passes through (3,-1) and is perpendicular to the line that passes through (-5, 2)

MArishka [77]

For lines to be perpendicular their slopes must be negative reciprocals of one another, mathematically:

m1*m2=-1

So we first need to find the slope of the reference line.

m=(y2-y1)/(x2-x1)=(7-2)/(-1--5)=5/4

So the perpendicular line will have a slope of:

5m/4=-1

m=-4/5

So our perpendicular line so far is:

y=-4x/5+b, now we can use point (3,-1) to solve for the y-intercept, "b"

-1=-4(3)/5+b

-1=-12/5+b

-5/5+12/5=b

7/5=b

So the line is:

y=-4x/5+7/5 or more neatly

y=(-4x+7)/5

y=-0.8x+1.4

3 0

3 years ago

Is the given number a solution of the equation? Which value of c is a solution to the equation c = 2c – 4?

serg [7]

C - 2c = 2c - 2c - 4
c - 2c = -4
-c = -4
c = 4

5 0

3 years ago

Three different golfers played a different number of holes today. Rory played 999 holes and had a total of 424242 strokes. Alici

Marat540 [252]

Golfer had the lowest number of strokes per hole is Alicia  = 4.

Step-by-step explanation:

We have , Three different golfers played a different number of holes today. Rory played 999 holes and had a total of 424242 strokes. Alicia played 181818 holes and had a total of 797979 strokes. Rickie played 272727 holes and had a total of 123123123 strokes. We have to find , Which golfer had the lowest number of strokes per hole :

Rory:

Number of strokes per hole = $\frac{424242}{999} = 425$