All categories

3 years ago

How do i know if a shape is concave or convex

Mathematics

1 answer:

horsena [70]3 years ago

3 0

Answer:

You can use the word cave to help you remember the difference between convex and concave polygons. A convex polygon has all its vertices, or corners, pointing out from the center, but a concave polygon looks like it has been caved in

Step-by-step explanation:

You might be interested in

Solve the system of equations by substitution. 3/8 x + 1/3 y =17/24 and <br> x + 7y = 8

goblinko [34]

$\left \{ {{ \frac{3}{8}x+ \frac{1}{3}y = \frac{17}{14} } \atop {x+7y=8}} \right.$

To solve this system by substitution, first isolate x in the second equation.

$x+7y=8$
$x+7y-7y=8-7y$
$x=8-7y$

Now, plug this expression ( $8-7y$ ) for x in the top equation to solve for y.

$\frac{3}{8} (8-7y)+ \frac{1}{3} y= \frac{17}{14}$
$3- \frac{21}{8} y+ \frac{1}{3} y= \frac{17}{24}$
$72-63y+8y=17$
$72-55y=17$
$-55y=17-72$
$-55y=-55$
$y=1$

Now that you have y, plug it into the second equation and solve for x.

$x+7y=8$
$x+7(1)=8$
$x+7=8$
$x=1$

Last step is to plug your x- and y-values in to both equations to check your work.

$\frac{3}{8} (1)+ \frac{1}{3} y= \frac{17}{24}$

$\frac{3}{8} * \frac{3}{3} = \frac{9}{24} ; \frac{1}{3} * \frac{8}{8} = \frac{8}{24}$

$\frac{9}{24} + \frac{8}{24} = \frac{17}{24}$ <--True

$1+7(1)=8$
$1+7=8$ <--True

Answer:
$x=1 \\ y=1$

5 0

4 years ago

HELP!!!!!!!!!! 19POINTS!!!!!!!!!!!!!!!!!!

Juli2301 [7.4K]

F(x) = (-1)^x* 2^(2x-1)

5 0

3 years ago

Can someone explain what happens here?

AveGali [126]

Answer:

Step-by-step explanation:

7 0

3 years ago

1?<br> If f(x) =<br> 5x4 + 3, then what is the remainder when f(x) is divided by x

Ede4ka [16]

20+3=23 divided by 2 ==11.5

6 0

3 years ago

A submarine was in a resting position 400 m below sea level. It rose 225 m. Determine its new depth?

Arturiano [62]

Answer:

175 meters, since its below sea level it would be- -400m - (-225m), subtracting with negative # and negative # is the equivalent of getting closer to zero, just figure out 400 - 225, and put a - symbol at the beginning of the number

4 0

3 years ago