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2 years ago

SOMEONE PLEASEEEEE HELP .... GIVING BRAINILEST!!!

Mathematics

2 answers:

Lesechka [4]2 years ago

7 0

Answer:

m = 5

n = 15

Step-by-step explanation:

n + n+6 = 3m + 7m-14

2n + 6 = 10m - 14

2n = 10m -20

n = 10m/2 - 20/2

n (simplified) = 5m-10

we can let 'n' = 5m-10 using 'substitution':

3m = 5m-10

-2m = -10

m = 5

now we can find 'n':

n = 5m-10

n = 5(5)-10

n = 25-10

n = 15

CHECK:

3(5) + 7(5)-14 should equal 15 + 15 + 6

15 + 21 = 36

36=36 [checks out]

Vanyuwa [196]2 years ago

3 0

Answer: Value of M: -49

Value of N: 24

Step-by-step explanation:

Yw and pls mark me brainiest

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How heavy a load (pounds) is needed to pull apart pieces of wood 4 inches long and 1.5 inches square? Here are data from student

statuscvo [17]

Answer:

a. (29526.192 , 32155.808)

b. (29673.9301 , 32008.0699)

Step-by-step explanation:

on calculation, we find that sample mean = 30843 and sample standard deviation = 3018.504, and n=20

Sample Mean = 30841

SD = 3000

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 670.8204

alpha (a) = 1 - 0.95 = 0.05

z critical value for 95% confidence interval:

z(a/2) = z(0.025) = 1.96

Margin of Error (ME) = z(a/2) x SE = 1314.808

95% confidence interval is given by:

Sample Mean +/- (Margin of Error) = 30841 +/- 1314.808

= (29526.192 , 32155.808)

2)when std dev of population is not known, we use sample's, but we have to use t instead of z

Sample Mean = 30841

SD = 3018.504

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 674.958

alpha (a) = 1-0.9 = 0.1

we use t-distribution as population standard deviation is unknown

t(a/2, n-1 ) = 1.7291

Margin of Error (ME) = t(a/2,n-1)x SE = 1167.0699

90% confidence interval is given by:

Sample Mean +/- (Margin of Error)

30841 +/- 1167.0699 = (29673.9301 , 32008.0699)

4 0

3 years ago

12.Divide. (x^2+2x+1/x^2-8x+16)/(x+1/x^2-16

lina2011 [118]

For this case we have the following expression:
(x ^ 2 + 2x + 1 / x ^ 2-8x + 16) / (x + 1 / x ^ 2-16)
Rewriting we have:
(((x + 1) (x + 1)) / ((x-4) (x-4))) / (x + 1 / ((x + 4) (x-4)))
Then, we cancel similar terms:
((x + 1) / (x-4)) / (1 / (x + 4))
Rewriting:
((x + 1) (x + 4)) / (x-4)
Answer:
((x + 1) (x + 4)) / (x-4)

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3 years ago

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NemiM [27]

For the first equation, the answer is C) completing the square.
For the second equation, the answer is B) zero product property.

For the first equation, we can easily complete the square by finding half of b and squaring it; then we can take the square root of both sides and solve the equation.

For the second equation, since it is already factored, we use the zero product property to solve it.

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3 years ago

What is the correct way to write three hundred nine million, fifty-eight thousand, three hundred four? A. 390,580,304 B. 309,58,

Leni [432]

C. 309,058,304

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3 years ago

Read 2 more answers

8/15 - 11/15?<br> Having trouble on my math homework

Sladkaya [172]

Answer:

-1/5

Step-by-step explanation:

8/15 - 11/15

(8-11)/15

-3/15

-1/5

4 0

2 years ago