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luda_lava [24]
3 years ago
14

Find the difference. (3ab+9a-2) - (-5ab+4)

Mathematics
1 answer:
JulsSmile [24]3 years ago
8 0

Answer:

3ab+9a-2+5ab-4

8ab+9a-6

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A B and C are collinear, and B is between A and C. The ratio of AB to AC is 2:7. If A is at (0,-8) and B is (2,-4), what are the
labwork [276]

Answer:

  C = (7, 6)

Step-by-step explanation:

The problem statement tells us the relation between the points is ...

  (B-A)/(C-A) = 2/7

  7(B -A) = 2(C -A) . . . . . . multiply by 7(C-A)

  7B -7A +2A = 2C . . . . . add 2A

  C = (7B -5A)/2 . . . . . . . divide by 2

  C = (7(2, -4) -5(0, -8))/2 = (14, 12)/2 . . . . . fill in the values of A and B

  C = (7, 6)

5 0
3 years ago
A leading magazine (like Barron's) reported at one time that the average number of weeks an individual is unemployed is 27 weeks
miss Akunina [59]

Answer:

X ~ N(27, 4) ;

xbar ~ N(27, 0.1026) ;

0.5 ;

0.5

Step-by-step explanation:

Probability distribution of X : N(μ, σ²)

μ = 27 ; σ = 2

X ~ N(μ, σ²) = X ~ N(27, 2²) ;X ~ N(27, 4)

Distribution is approximately normal ; μ = xbar ; xbar = 27

(Standard Error)² = (σ/√n)²= (2/√39)² = 0.1026

xbar ~ N(μ, σ²) = xbar ~ N(27, 2²) ; xbar ~ N(27, 0.1026)

Probability that a randomly selected individual found a job in less than 27 weeks :

P(X < 27) :

Obtain the Zscore :

Z = (x - μ) / σ

Z = (27 - 27) / 2 = 0/2

Z = 0

P(Z < 0) = 0.5

D.) n = 36

P(X < 27) :

Obtain the Zscore :

Z = (x - μ) / σ/√n

Z = (27 - 27) / (2/√36) = 0/0.33333

Z = 0

P(Z < 0) = 0.5

7 0
3 years ago
If you work 8 hours every two days, how many hours will he work in 7 days
zubka84 [21]

Answer:

28 hours for 7 days

Step-by-step explanation:

8/2 =

4

4 hours for 1 day

1 x 7 =

7

7 x 4

28

28 for 7 days

6 0
2 years ago
Read 2 more answers
V=x^3+13x^2+34x-48 find an expression for the missing dimension
MariettaO [177]

Answer:


Step-by-step explanation:

The answers you get for zeros are - 8 1 and - 6.

I'm not sure what you are looking for.

4 0
3 years ago
Mel cleans houses. She earns $7.50 every hour she dusts. She earns $10.00 every hour that
r-ruslan [8.4K]
Scrubbing the floor=15:00$
Dusting=15:00$
Total:30:00$
7 0
2 years ago
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