All Questions ⁺⁰235714 Questions

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Geometry

In triangle $ABC,$ $D$ is on side $\overline {AB}.$ We know $\triangle ABC \sim \triangle ACD$. If $BC = BD,$ what is $\angle B$ in degrees?

tomtom Jan 12, 2024

+1

41

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+25

pls help urgent

A dilation with scale factor K takes figure A to figure B. Find the sum of all possible values of .
Figure A is a square with side length 2.
Figure B is a square with side length 5.
I think read more ..

nathan166656 Jan 12, 2024

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44

2

+1768

help with angles and lines

Can anyone help?

bader Jan 12, 2024

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39

5

+1768

Help with parallel lines plz

Help how do you do this

DS2011 ●●●●●

bader Jan 12, 2024

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35

1

+4

plz help

As shown in the diagram angle BAC=90 degrees. Let X be the foot of the altitude from A to overline BC, AY be the bisector of angle BAC, and AZ be the median of triangle ABC. If angle XAY = 16 degrees, then what is the measure of angle ZAC in degrees?</ read more ..

kpopstan Jan 12, 2024

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52

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+1439

need help

In triangle $ABC$, $M$ is the midpoint of $\overline{BC}$, and $N$ is the midpoint of $\overline{AC}$. The perpendicular bisectors of $BC$ and $AC$ intersect at a point $O$ inside the triangle. If $\angle AOB = 90^\circ$, then find the measure read more ..

kittykat Jan 12, 2024

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46

3

+25

pls help

The regular polygon below is cut out of a flat piece of cardboard. The polygon is then placed back into the hole.
In how many ways can the polygon be placed back into the hole, if the polygon can be rotated, but not reflected?

nathan166656 Jan 12, 2024

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35

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+1439

help with triangles

Point D is the midpoint of median \overline{AM} of triangle ABC. Point E is the midpoint of \overline{AB}, and point T is the intersection of \overline{BD} and \overline{ME}. Find the area of triangle AMC if [ABC] =180.

kittykat Jan 12, 2024

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pls help im confused

Point B is the image of point A under a dilation with center O. If AB = 30, and the scale factor of the dilation is 5, then what is OA?

nathan166656 Jan 12, 2024

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24

1

+1443

help quadratic

What real value of $t$ produces the smallest value of the quadratic $t^2 -9t - 36 + 13t - 60$?

blackpanther Jan 12, 2024

+1

39

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+290

Question In My Math Book

The vertices of are , , and
a. What are the vertices of ?
b. What are the vertices of ?
( O is the origin ) read more ..

DS2011 Jan 12, 2024

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43

2

+1443

Quadratic

If $s$ is a real number, then what is the smallest possible value of $2s^2 - 8s + 19 - 7s^2 - 8s + 20$?

blackpanther Jan 12, 2024

+1

21

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+290

Trig Problem

A flag pole 18 meters tall casts a shadow 12 meters long at a specific time of day. Find, to the nearest degree, the angle of elevation of the sun at this time of day.

ElectricPavlov ●

DS2011 Jan 12, 2024

+1

11

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+290

Trig Problem

From point P on the ground, the angle of elevation of an airplane is 23º. The altitude of the plane is 1200 meters. What is the distance from point P to the airplane, to the nearest tenth of a meter?

ElectricPavlov ●

DS2011 Jan 12, 2024

+1

29

1

+290

Trig Problem

On a windy day, a 30 meter rope tightly secures a hot air balloon to a stake in the ground. From the balloon, the angle of depression of the stake is 62º. Find, to the nearest centimeter, the height of the balloon, assuming the wind to be con read more ..

DS2011 Jan 12, 2024

-1

28

1

+1443

Quadratic Functions

If $t$ is a real number, what is the maximum possible value of the expression $-t^2 + 8t -4 +5t^2 - 4t + 18$?

blackpanther Jan 12, 2024

+2

29

1

+17

Arithmetic sequence

The 80th term of an arithmetic sequence is twice the 30th term. If the first term of the sequence is 7, what is the 40th term?

ElectricPavlov ●

ruiruima Jan 12, 2024

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45

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+1911

Help with area

Help, how do I do this?
In triangle $ABE,$ $C$ and $D$ are points on sides $\overline{BE}.$ If $BD = 18$, $CE = 7$, $[ABC] = 13$, and $[ADE] = 22$, then find $[ACD]$.

tomtom Jan 12, 2024

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45

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+1911

Triangle

In triangle $ABC,$ points $P$ and $Q$ are on side $\overline{AB},$ and point $R$ is on side $\overline{AC}.$ If $\frac{AP}{2} = \frac{PQ}{5} = \frac{QB}{11}$ and $\frac{AR}{8} = \frac{RC}{13},$ then find $\frac{[QBC]}{[CRQ]}.$

tomtom Jan 12, 2024

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46

1

+1533

Parabola

Graph a parabola with axis of symmetry $x = 3,$ an $x$-intercept at $x = -8,$ and $y$-intercept $5.$

parmen Jan 12, 2024

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22

2

+1533

Circle

Find the area of the region enclosed by the graph of $x^2 + y^2 = 2x - 6y + 6 + 14x - 16y + 80$.

parmen Jan 12, 2024

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47

1

+1533

Parabola

Find the vertex of the graph of the equation y = -2x^2 + 8x + 15 - 3x^2 + 7x - 25

ElectricPavlov ●

parmen Jan 12, 2024

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44

1

+1533

Parabola

Find the vertex of the graph of the equation $x - y^2 + 8y = 13 + 2y + y^2 - 7y - 14$.

ElectricPavlov ●

parmen Jan 12, 2024

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