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3 years ago

Plz plz plz help me with this question

Mathematics

2 answers:

Gnoma [55]3 years ago

8 0

My teacher told be to try and think of it as a circle, because circles are 360 degrees. Then to place those angles in the circle and it should make it easier to find the angles, because when you see it in the circle, you can divide it into 4 parts so that you would then have 4, 90 degree angles that you can then work off of by placing those angles you need to find into the circle. It was supposed to make it easier, and i genuinely hope that you can do this. You got this, and you will get through the pain of math tonight and many more. Good luck. ^-^

enyata [817]3 years ago

3 0

Vertical: opposite from each other (will have same degree)
Alternate exterior: the angles outside that are opposite of eachother (will have same degree)
Alternate interior: angles inside that are opposite of eachother (will have same degree)
Corresponding: the angle on the same side at the same level (will have same degree) example for corresponding: use picture for this question: giving angle 1 the corresponding angle will be 5 why?? They are both above the dividing line and are left of the parallel lines j and k
4. v 1,4 5,8 3,2 7,6
5. ae 2,7 1,8
6. ai 3,6 4,5
7. C 1,5 3,7 4,8 2,6

8. Angle 1 = 135 Given* other angle will be 45 *
Angle 2= 45 supplimentary angle add up to 180 (1,2)
Angle 3= 45 supplumentary angles add up to 180 (1,3)/ vertical angles =each other (2,3)
Angle 4= 135 vertical angles = each other (1,4)
Angle 5= 135 complimentary angles = each other (1,5)
Angle 6= 45 corresponding angles = each other (6,2) alternate interior angles = each other (3,6)
Angle 7= 45 corresponding angles = each other (3,7) alternate exterior angles = each other (7,2)
Angle 8= 135 alternate exterior angles= each other (1,8) hope that's not too confusing let me know if this helped

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when Jeremy surveyed Thirty seventh grade students at the community pool he found that to a 15 had not read at least one book du

Anettt [7]

200 * 2/15 = the number of students that didn't read any books. This is 26.6, so 40 is not a good estimate 40 students is 20 percent versus 26 being approximately 13 percent.

hope this helps i tryed

ur welcome(;

have a great day

8 0

3 years ago

There are 24 boys and 16 girls in a hall, each holding coins in their hand.

Dmitry_Shevchenko [17]

Answer:

Step-by-step explanation:

total=average ×no.

18×40=720 the no. of coins for all children

12×24=288 no. of coins for boys

720-288=432 for all girls

one girl, mean,divide 432 by 16= 27

5 0

3 years ago

Find the optimal solution for the following problem. (Round your answers to 3 decimal places.)

Sphinxa [80]

Answer:

x=2.125

y=0

C=19.125

Step-by-step explanation:

To solve this problem we can use a graphical method, we start first noticing the restrictions $x\geq 0$ and $y\geq 0$ , which restricts the solution to be in the positive quadrant. Then we plot the first restriction $8x+10y\leq 17$ shown in purple, then we can plot the second one $11x+12y\leq 25$ shown in the second plot in green.

The intersection of all three restrictions is plotted in white on the third plot. The intersection points are also marked.

So restrictions intersect on (0,0), (0,1.7) and (2.215,0). Replacing these coordinates on the objective function we get C=0, C=11.9, and C=19.125 respectively. So The function is maximized at (2.215,0) with C=19.125.

3 0

3 years ago

The variable Z is directly proportional to X. when X is 15, Z has the value of 45. what is the value of Z when X=23

IrinaVladis [17]

$If\ Z\ is\ directly\ proportional\ to\ X\ then\ \frac{Z}{X}=const.\\------------------------\\X=15\ and\ Z=45\\\\X=23\ and\ Z=?\\\\\frac{Z}{23}=\frac{45}{15}\to\frac{Z}{23}=3\ \ \ \ |multiply\ both\ sides\ by\ 23\\\\\huge\boxed{Z=69}$

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3 years ago

(Geometry course question) Explain why it is not possible to construct an equilateral triangle that has

Nutka1998 [239]

Answer:

√3 is irrational

Step-by-step explanation:

The location of the third point of a triangle can be found using a rotation matrix to transform the coordinates of the given points.

<h3 /><h3>Location of point C</h3>

With reference to the attached figure, the slope of line AC is √3, an irrational number. This means the line AC <em>never passes through a point with integer coordinates</em>. (Any point with integer coordinates would be on a line with rational slope.)

<h3>Equilateral triangle</h3>

The line segments making up an equilateral triangle are separated by an angle of 60°. If two vertices are on grid squares, the third must be a rotation of one of them about the other through an angle of 60°. The rotation matrix is irrational, so the rotated point must have irrational coordinates.

The math of it is this. For rotation of (x, y) counterclockwise 60° about the origin, the transformation matrix is ...

$\left[\begin{array}{cc}\cos(60^\circ)&\sin(60^\circ)\\-\sin(60^\circ)&\cos(60^\circ)\end{array}\right] \left[\begin{array}{c}x\\y\end{array}\right]=\left[\begin{array}{c}x'\\y'\end{array}\right]$

Cos(60°) is rational, but sin(60°) is not. For any non-zero rational values of x and y, the sum ...

cos(60°)·x + sin(60°)·y

will be irrational.

As in the attached diagram, if one of the coordinates of the rotated point (B) is zero, then one of the coordinates of its image (C) will be rational. The other image point coordinate cannot be rational.

6 0

2 years ago