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SCORPION-xisa [38]
3 years ago
12

Express (root 19 - root 7)(root 19 + root 7) in simplest form.

Mathematics
2 answers:
r-ruslan [8.4K]3 years ago
7 0

Answer

root 354

Step-by-step explanation:

Svetllana [295]3 years ago
3 0

Answer:

12

Step-by-step explanation:

(√19 -√7)(√19 +√7)

( a +b)( a -b) = a²-b²

(√19)² -(√7)² = 19 -7 = 12

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the elevator of new orleans, louisiana is on average 8 ft below sea level. the elevation of EL Centro, california is 39ft below
Svetllana [295]
The difference in elevation equals subtraction. In other words 39ft subtracted by 8ft equals 31ft. So New Orleans, Louisiana is 31ft ABOVE sea level compared to EL Centro, California.
6 0
3 years ago
Help me with this please!!!!!
miv72 [106K]

Answer:

Yes, the slopes of AB and BC are the same.

Step-by-step explanation:

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8 0
3 years ago
if ashley is in the 85th percentile and the mean of her test scores is 80 with a standard deviation of 15, which of the followin
kkurt [141]
The 85th percentile is a probability of 0.85 and its location is shown in the bell curve below 

We need to look up on the z-table the value of z when P(Z<z) = 0.85 or P(Z>z) = 0.15

Value of z-score when p-value P(Z>z) = 0.15 is z = 1.0364

Next step is to use the formula of z-score to work out X
z-score = (X-μ) / σ
1.0364 = (X-80) / 15
1.0364 × 15 = X - 80
X = 15.546 + 80
X = 95.5

Most likely score that Ashley gets is 95.5


8 0
3 years ago
Read 2 more answers
A very weak university is on and off probationary status with the accrediting agency. A different procedure is used in July and
tino4ka555 [31]

Answer:

0.3425 = 34.25% probability it will be off probation in February 2020

Step-by-step explanation:

We have these desired outcomes:

Off probation in July 2019, with 0.25 probability, then continuing off in January, with 1 - 0.08 = 0.92 probability.

Still in probation in July 2019, with 1 - 0.25 = 0.75 probability, then coming off in January, with 0.15 probability.

What is the probability it will be off probation in February 2020?

p = 0.25*0.92 + 0.75*0.15 = 0.3425

0.3425 = 34.25% probability it will be off probation in February 2020

6 0
3 years ago
I don't get this problem
Maslowich
Just assuming - A = 20, B = 120, and C = 40
F = 30, G = 75, and H = 75
4 0
3 years ago
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