Determine which ordered pairs are solutions to the equation 3x+7y=21

Mathematics

1 answer:

mafiozo [28]2 years ago

7 0

Answer:

(0,3) and (7,0) are solutions.

Step-by-step explanation:

In a pair of coordinates, they are always listed as (x,y). Since this is the case, you plug in each coordinate to their respective places.

For (0,3)

3(0) + 7(3) = 21

0 + 21 = 21

For (7,0)

3(7) + 7(0) = 21

21 + 0 = 21

To double check that (1,2) isn't a solution:

3(1) + 7(2) = 21

3 + 14 = 21

17 = 21 X

This doesn't work.

Marking as Brainliest is much appreciated.

You might be interested in

During a film festival, the first film ticket is priced at $16, and each additional ticket is $11. if Rico spends $71, then how

ArbitrLikvidat [17]

Rico purchased a total of 6 tickets.

7 0

2 years ago

Read 2 more answers

Can someone help me with this please

makvit [3.9K]

Rise over run
mx+b
1/3x-1

6 0

2 years ago

Random samples of size 81 are taken from an infinite population whose mean and standard deviation are 200 and 18, respectively.

TiliK225 [7]

Answer:

d. 200 and 2

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .