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Zinaida [17]
3 years ago
12

Which step is not necessary when solving this system of equations by graphing? 3x-y=4 x+y= -4

Mathematics
2 answers:
puteri [66]3 years ago
6 0

Answer:

determine the shaded area for each line

Step-by-step explanation:

its not need

lions [1.4K]3 years ago
3 0

Answer: The answer is C: determine the shaded area for each line.

Just took the test on Edg.

Step-by-step explanation:

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How do I solve this?
Sonbull [250]

The question is somewhat poorly posed because the equation doesn't involve <em>θ</em> at all. I assume the author meant to use <em>x</em>.

sec(<em>x</em>) = csc(<em>x</em>)

By definition of secant and cosecant,

1/cos(<em>x</em>) = 1/sin(<em>x</em>)

Multiply both sides by sin(<em>x</em>) :

sin(<em>x</em>)/cos(<em>x</em>) = sin(<em>x</em>)/sin(<em>x</em>)

As long as sin(<em>x</em>) ≠ 0, this reduces to

sin(<em>x</em>)/cos(<em>x</em>) = 1

By definition of tangent,

tan(<em>x</em>) = 1

Solve for <em>x</em> :

<em>x</em> = arctan(1) + <em>nπ</em>

<em>x</em> = <em>π</em>/4 + <em>nπ</em>

(where <em>n</em> is any integer)

In the interval 0 ≤ <em>x</em> ≤ 2<em>π</em>, you get 2 solutions when <em>n</em> = 0 and <em>n</em> = 1 of

<em>x</em> = <em>π</em>/4   <u>or</u>   <em>x</em> = 5<em>π</em>/4

5 0
2 years ago
7/10 - 5/8 in simplest form ​
NISA [10]

Answer:

3/40 :D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Identify the x-intercept and y-intercept of the equation below.
Radda [10]

Answer:

x intercept at (7/3 , 0)

y intercept at (0,-3)

Step-by-step explanation:

9x-7y=21

we need to find x  and y intercepts

To find x intercept , plug in 0 for y

9x - 7(0) = 21

9x = 21

divide by 9 on both sides

x= 21/ 9 = 7/3

so x intercept at (7/3 , 0)

To find y intercept , plug in 0 for x

9(0) - 7(y) = 21

-7y = 21

divide by -7 on both sides

y= -3

so y intercept at (0,-3)

6 0
3 years ago
Anna baked 3 batches of cookies with c cookies in each batch. She then ate 8 cookies! How many cookies does Anna have left? Writ
borishaifa [10]

Answer:

3c-8

Step-by-step explanation:

Let

c-------> the number of cookies in each batch

we know that

To find the total number of cookies, multiply the number of batches by the  number of cookies in each batch

so

3c ------> equation that represent the total number of cookies

If Anna ate 8 cookies

then

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3c-8

8 0
3 years ago
X+2=19 <br><br>Write a story​
snow_lady [41]

Answer:

19 - 2 = x The X will be 17

I have x candy, but my friend only have 2 candy which is less than me, but our total is 19 candy. How many candy do I have?

You could make similar story if you want to. But the X is 17.

8 0
3 years ago
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