What is the value of the underlined digit? 56.13 5 5 50 10 100 10

Write the canonical equation of the straight line 2x+3y-2z+6=0, x-3y+z+3=0

Romashka-Z-Leto [24]

i hope this helps

let me know if im wrong

6 0

4 years ago

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.

MAVERICK [17]

Answer:

The graph is symmetric about the x-axis only

Step-by-step explanation:

* Lets study the limacon curve

- Equations of the form:

# r = a + b sin θ

# r = a – b sin θ

# r = a + b cos θ

# r = a – b cos θ

All will produce limacons.

* Lets examine what happens for various values of a and b.

- When the value of a is less than the value of b, the graph is

a limacon with and inner loop.

- When the value of a is greater than the value of b, the graph is

a dimpled limacon.

- When the value of a is greater than or equal to the value of 2b,

the graph is a convex limacon.

- When the value of a equals the value of b, the graph is a special

case of the limacon. It is called a cardioid.

* Notice that, in each of the graphs of the liamcons, changing

from sine to cosine does not affect the shape of the graph just its

orientation.

- Equations using sine will be symmetric to the vertical axis

- Equations using cosine are symmetric to the horizontal axis.

∵ r = -2 + 3 cos Ф

- from the notes up the equation of cosine is symmetric to

the horizontal axis

∴ The graph is symmetric about the x-axis only

3 0

3 years ago

Use the unit circle to find the value of tan (225 degrees

BARSIC [14]

if you don't have a Unit Circle, this is a good time to get one, you'd need it, you can find many online.

Check the picture below.

3 0

3 years ago

Read 2 more answers

according to a food and drug administration (FDA) study, a cup of coffee contains an average of 115 mg of caffeine, with the amo

Nady [450]

Answer: 139

Step-by-step explanation:

As per given , we have

The amount of caffeine per cup is ranging from 60-180 mg.

Range = Maximum - Minimum = 180 -60 =12

According to Range -rule ,

Standard deviation = $s\approx\dfrac{Range}{4}=\dfrac{120}{4}=30$

Formula for sample size : $n=(\dfrac{z^*\times s}{E})^2$ , where z* is critical z value and E is margin of error.

By z-table , the critical z-value for 95% confidence interval = 1.96

E= 5

Put all values in formula , we get

$n=(\dfrac{(1.96)\times 30}{5})^2=138.2976\approx139$

Hence, 139 cups of coffee would have be included in the sample.

7 0

4 years ago

PLS PLS PLS I need help on this question

Rufina [12.5K]

Answer:

Well i cant see the whole question but it might be B or D

Step-by-step explanation:

5 0

3 years ago