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beks73 [17]
2 years ago
5

In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Brad has sc

ored 82, 94, and 92 on the first three. What range of scores on the fourth test will give Brad a B for the semester (an average between 80 and 89, inclusive)? Assume that all test scores have a non-negative value.
Express your answer in interval notation.
Mathematics
1 answer:
AfilCa [17]2 years ago
3 0

Answer:

70 ≤ (94 + 89 + 78 + s)/4 ≤ 79

280 ≤ 261 + s ≤ 316

19 ≤ s ≤ 55

Step-by-step explanation:

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Alecsey [184]

Answer:

25 friends

Step-by-step explanation:

85 - 10 = 75

75/3 = 25

Answer check:

25*3 = 75

75 + 10 = 85

DeShawn has 25 friends. (Wow, DeShawn must be popular)

6 0
3 years ago
Which one is equivalent what’s the work that goes with it? i’m very confused
Elenna [48]

Answer:

0.8r

Step-by-step explanation:

r - 0.2r

= 1r - 0.2r ← factor out r from each term

= r(1 - 0.2)

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= 0.8r

5 0
2 years ago
Iven 5 different letters, how many different ways can you arrange 3 of them (whether they spell a word or not)
nevsk [136]
Permutation so 5!/(5-3)!=5!/2!= 5 x 3 x 4= 60 ways.
4 0
4 years ago
Roberto purchased airline tickets for his family of 4. The tickets cost $1,250.The airline also charged a luggage fee,bringing t
goblinko [34]

Find the difference:

1400 - 1250 = 150

Divide the difference by the starting value:

150 / 1250 = 0.12

Multiply by 100:

0.12 x 100 = 12% increase.

3 0
3 years ago
Read 2 more answers
I NEED HELP ASAP PLEASE!!!!
givi [52]

Answer:

Hello!

An irrational number is all the real numbers which are not rational numbers.

M = \sqrt{2 is a irrational number.

N = \sqrt{5} is a irrational number.

S = 2 is not irrational, and is actually a whole number.

T = 5 is not irrational, and is actually a whole number.

Have a great day!

I hope this helps! <33

4 0
3 years ago
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