3 years ago

Which set of rectangular coordinates describes the same location as the polar coordinates (4,pi)?

Mathematics

2 answers:

Nuetrik [128]3 years ago

8 0

Answer:

(-4,0)

Step-by-step explanation:

Nataly [62]3 years ago

6 0

$\bf (\stackrel{r}{4}~,~\stackrel{\theta }{\pi })\qquad \begin{cases} x=&rcos(\theta )\\ &4cos(\pi )\\ &4(-1)\\ &-4\\ y= &rsin(\theta )\\ &4sin(\pi )\\ &4(0)\\ &0\\ \end{cases}\qquad \implies (\stackrel{x}{-4}~,~\stackrel{y}{0})$

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Solve system by elimination -9x - y =-19 5x + y = 15

vredina [299]

Answer:

(1, 10 )

Step-by-step explanation:

Given the 2 equations

- 9x - y = - 19 → (1)

5x + y = 15 → (2)

Adding the 2 equations term by term will eliminate the y- term

- 4x + 0 = - 4

- 4x = - 4 ( divide both sides by - 4 )

x = 1

Substitute x = 1 into either of the 2 equations and solve for y

Substituting into (2)

5(1) + y = 15

5 + y = 15 ( subtract 5 from both sides )

y = 10

solution is (1, 10 )

6 0

2 years ago

Jay needs 19 quarts more paint for the outside of his barn than for the inside. If he uses 107 quarts in all, how many gallons o

love history [14]

Let's use q to represent the number of quarts needed.

you would have the following:

2q= 107-19
2q=88
q=44
44 is the number of quarts in a in the barn.
Now you have to divide that number by 4 to get gallons because there is 4 quarts in a gallon.
There are 11 gallons of paint.

6 0

3 years ago

1 n +5 - 1 n2 + n n2 +n n-6 n +1

chubhunter [2.5K]

1). 1n+5-1
N=26
2). n2+n n2+n
n3+n2+n

6 0

3 years ago

Pls solve correct!! Whoever gets it right gets brainlist!! I NEED THIS ANSWER NOW PLS!!

Reika [66]

I think it would be 88 square inches

5 0

3 years ago