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4 years ago

Math question 8th grade

Mathematics

1 answer:

Elina [12.6K]4 years ago

3 0

y = 4x + 1

check

for x = 1 → y = 4(1) + 1 = 4 + 1 = 5 OK

for x = 4 → y = 4(4) + 1 = 16 + 1 = 17 OK

for x = 5 → y = 4(5) + 1 = 20 + 1 = 21 OK

for x = 7 → y = 4(7) + 1 = 28 + 1 = 29 OK

for x = 9 → y= 4(9) + 1 = 36 + 1 = 37 OK

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Answer:

Step-by-step explanation:

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3 years ago

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Answer: 1.460

Step-by-step explanation:

Given : Researchers report that on average freshman who live on campus gain 15 pounds during their first year in college.

Let $\mu$ represents the population mean .

Then, the set of hypothesis will be:-

$H_0: \mu=15$

$H_a:\mu\neq15$

We assume that this is normal distribution.

Sample size : n = 10, which is a small sample (n<30) ,s o we use t-test.

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Standard deviation : $\sigma=2.6$

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$t=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

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3 years ago

Given that, in a certain school, the following are true, what is the probability that a student is taking math or computer scien

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Answer:

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3 years ago

3x + 2y = 5<br> X – 2y = -1

inysia [295]

Answer:

(1, 1 )

Step-by-step explanation:

Given the 2 equations

3x +2y = 5 → (1)

x - 2y = - 1 → (2)

Adding the 2 equations term by term will eliminate the term in y, that is

(3x + x) + (2y - 2y) = (5 - 1)

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x = 1

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

Substituting in (1)

3(1) + 2y = 5

3 + 2y = 5 ( subtract 3 from both sides )

2y = 2 ( divide both sides by 2 )

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