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max2010maxim [7]
4 years ago
5

20. Find the value of the variable y in the equation –5.7 + y = 8.2. A. –2.5 B. 2.5 C. –13.9 D. 13.9

Mathematics
1 answer:
Elena L [17]4 years ago
8 0

-5.7+y=8.2\qquad\text{add 5.7 to both sides}\\\\\boxed{y=13.9}\to\boxed{D.}

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3. The sum of three consecutive numbers<br> is 42. What are the numbers?
Zanzabum

Answer:

13 + 14 + 15

Step-by-step explanation:

n + (n + 1) + (n +2) =42

n + n + n + 1 + 2 = 42

3n + 3 = 42

(subtract 3 from both sides)

3n = 39

(divide both sides by 3)

n = 13

(solve)

n + (n + 1) + (n +2) =42

13 + (13 + 1) + (13 + 2) = 42

13 + (14) + (15) = 42

13, 14, 15

(Hope this helps, have a nice day!)

3 0
3 years ago
What is the next number in the pattern below?
UkoKoshka [18]

3,5,9,15,23

5-3=2

9-5=4

15-9=6

23-15=8

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Answer is 33-B.

7 0
3 years ago
Read 2 more answers
A sequence is defined recursively using the formula f(n + 1) = -0.5f(n). If the first term of the sequence is 120, what is f(5)?
PolarNik [594]

Answer: 7.5

Step-by-step explanation:

The given formula tells us that the next term f(n+1) of the sequence is -0.5 times the previous term f(n)

First term of the sequence is f(1) = 120

Second term of the sequence is f(2) = f(1+1) = -0.5 f(1) = -0.5 (120) = -60

Third term of the sequence is f(3) = f(2+1) = -0.5 f(2) = -0.5 (-60) = 30

Fourth term of the sequence is f(4) = f(3+1) = -0.5 f(3) = -0.5 (30) = -15

Fifth term of the sequence is f(5) = f(4+1) = -0.5 f(4) = -0.5 (-15) = <em>7.5</em>

3 0
4 years ago
Read 2 more answers
Which is equivalent to (4xy – 3z)2, and what type of special product is it?
Semmy [17]
The last choice is right sure because this is a perfect square trinomial

(4xy -3z)^2 = 16x^2y^2 -24xyz +9z^2

hope this will help you 
5 0
3 years ago
Read 2 more answers
Large soda bottles are on sale three for six dollars. Sasha has eighteen dollars to spend on soda. How
Diano4ka-milaya [45]

Answer:

Sasha can buy 6 bottles of soda.

Step-by-step explanation:

6x2=18

3x2=6

6 0
3 years ago
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