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pav-90 [236]
3 years ago
8

I don’t get how you get a and b

Mathematics
1 answer:
Alisiya [41]3 years ago
6 0


For this question, you will now need to solve for both a and b, you can break down the expression that they want you to find:

(a^2-b^2)/(a-b)
= (a+b)(a-b)/(a-b) (Difference of squares)
= a+b (The (a-b) is common at the top and bottom so they will cancel

Now a+b =
Therefore the answer is (C)
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Which of the following phrases are inequalities?
aev [14]

Answer:

B, C, and D

Step-by-step explanation:

They have an either a less than sign ( < ) or a greater than sign ( > ).

4 0
3 years ago
Can someone help with this math question please
Ugo [173]
DC-10
At t=0 the altidude is 4500 feet
It's descending at a rate of 150 feet per minute, then each 5 minutes it descends (150 feet/min)(5 min)=750 feet. Then:
At t=5 the altitude is 4500 feet-750 feet=3750 feet
At t=10 the altitude is 3750 feet-750 feet=3000 feet

727
At t=0 the altidude is 600 feet
It's climbing at a rate of 75 feet per minute, then each 5 minutes it climbs (75 feet/min)(5 min)=375 feet. Then:
At t=5 the altitude is 600 feet+375 feet=975 feet
At t=10 the altitude is 975 feet+375 feet=1350 feet

The graph with these characteristics is Graph B.

Answer: The graph B shows when the two planes will be at the same altitude 
 
3 0
3 years ago
What’s the slope of C=50t+100
balandron [24]

Answer:

50

Explanation:

This equation is in y = mx+b form.

The m is the slope and the b is the y intercept. So, 50 is the slope and 100 is the y-intercept.

6 0
3 years ago
Read 2 more answers
"suppose that it is decided to reject the null hypothesis if the sample mean time lag is less than 18.5 days. what is the probab
sweet-ann [11.9K]
Answer : 17
.......... .
4 0
3 years ago
Read 2 more answers
Sixty dash fivesixty-five percent of households say they would feel secure if they had? $50,000 in savings. you randomly select
Effectus [21]

 To solve the following problems, we use the binomial probability equation:

P (r) = [n!/(n-r)! r!] p^r q^(n-r)

where,

n = total number of households = 8

r = number of sample

p = probability of success = 65% = 0.65

q = probability of failure = 0.35

 

A. r = 5

P (r=5) = [8! / 3! 5!] 0.65^5 0.35^3

P (r=5) = 0.28

 

B. r >5

P (r=6) = [8! / 2! 6!] 0.65^6 0.35^2

P (r=6) = 0.26

P (r=7) = [8! / 1! 7!] 0.65^7 0.35^1

P (r=7) = 0.14

P (r=8) = [8! / 0! 8!] 0.65^8 0.35^0

P (r=8) = 0.03

Therefore total is:

P (r>5) = 0.26 + 0.14 + 0.03 = 0.43

 

C. r ≤ 5

P (r ≤ 5) = 1 - P (r>5)

P (r ≤ 5) = 1 – 0.43

P (r ≤ 5) = 0.57

 

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3 0
3 years ago
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