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Strike441 [17]
2 years ago
12

Which equation represents a line which is Parallel to the line x+3y=-21

Mathematics
1 answer:
Luda [366]2 years ago
8 0

Answer:

a line with a gradient of

\frac{  - x}{3}

Step-by-step explanation:

parallel lines have equal gradients, i.e the value of m, has to be the same.

therefore:

x + 3y =  - 21  \\ 3y  =  - x - 21 \\ y =  \frac{ - x}{3}  -  7

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Two last help with math please and thanks!
12345 [234]
1st problem:
Use the Pythagorean theorem:
a^2+b^2=c^2
49+361=c^2
c^2=410
c=20.24
The answer is 20m

2nd problem:
First calculate the height using the Pythagorean theorem:
a^2+b^2=c^2
20^2+b^2=625     (i got 20 {radius} by half-ing the base edge length)
400+b^2=625
b^2=225
b=15

Next, solve for the volume:
V=a^2*h/3
V=40^2*15/3
V=1600*5
V=8000

The answer is the second choice or B.

5 0
4 years ago
Read 2 more answers
I need help before 10:00pm tonight
Citrus2011 [14]

The answer is B. The data is similar throughout the line.

7 0
4 years ago
What is the value of n in the equation 1/2 (n-4)-3=3-(2n+3)?
patriot [66]

Answer:

Solve for

n

by simplifying both sides of the equation, then isolating the variable.

n

=

2

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Check my work? <br> i’ll mark brainliest:)
Rufina [12.5K]

yes, you’re right. .

8 0
3 years ago
Read 2 more answers
HELP PLEASE ASAP<br> what is the mean of 210,160,200 ?
MrRissso [65]
To find the mean, add all the numbers then divide by the amount of numbers there are to find the average.

210+160+200=570

570÷3=190

Answer: 190 



5 0
3 years ago
Read 2 more answers
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