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Delvig [45]
3 years ago
9

Which expression is equivalent to 15 y - 8 y​ ?

Mathematics
2 answers:
34kurt3 years ago
7 0

Answer:

D. The expression 5 y plus 2 y is equivalent to 15 y minus 8 y.

Step-by-step explanation:

first we unite like terms from the given problem, 15y - 8y which gives 7y

next we compare that answer to the two options, so 5y + 2y is 7y

BUT 9y - 3y is actually equal to 6y

so based on the A, B, C, D choices, D is the only one that says a correct statement

remember that like terms are numbers that have the same letters, all of them, so for example:

like terms:

5x, 11x

3ab, 18ab

and other numbers that have the same letters (can't remember the actual name right now)

non like terms:

6y, 3a

3y, 16xy

so if the letters don't match, they're not like terms

siniylev [52]3 years ago
6 0

Answer:

D. The expression 5 y plus 2 y is equivalent to 15 y minus 8 y.

Step-by-step explanation:

15y - 8y = 7y

5y + 2y = 7y

This means that they are similar.

If this answer is correct, please make me Brainliest!

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6 0
2 years ago
Find the point on the graph of 2x+3y=12 where x=3
mafiozo [28]

Answer:

(3,2)

Step-by-step explanation:

2x+3y=12

substitute x with 3 because x=3

2(3)+3y=12

multiply

6+3y=12

(subtract 6 from both sides)

3y=6

(divide by 3 on both sides)

1y=2

x = 3 and y = 2

3 0
2 years ago
Read 2 more answers
In each turn of a game you toss two coins. if 2 heads come up, you win 2 points and if 1 head comes up you win 1 point. if no he
Blizzard [7]

The expected value of the number of points for each turn is 0.25

<h3>What is expected value?</h3>

Expected value describes the long term average level of a random variable based on its probabilty distribution.

Now, Probability that 2 heads come up is

P(2 is H) = 1/4

Probability that 1 heads come up is

P(1 is H) = 2/4

⇒P(1 is H) = 1/2

Probability that no head will come up

P(no H's) = 1/4

Hence, the expected value for winning of 2points, 1point and  lose of3 points is given as-

Expected value = 2 * P(2 is H) + 1 * P(1 is H)  - 3 * P(no H's)

⇒Expected value = 2 * 1/4 + 1 * 1/2 - 3 * 1/4

= 0.5 + 0.5 - 0.75

⇒Expected value = 0.25

More about Expected value :

brainly.com/question/22715250

#SPJ1

3 0
1 year ago
Translate the sentence into an equation, then solve the
Oduvanchick [21]

Answer:

The equation is: \frac{x-7}{5} = 13 and the number is 72.

Step-by-step explanation:

We have to use mathematical notation to convert the given statement into an equation. As we don't know the exact value of number, we have to use a variable in place of the number.

Let x be the required number then

"A number decreased by 7"

x-7

"and then  divided by 5"

\frac{x-7}{5}

" is 13."

\frac{x-7}{5} = 13

For solving, multiplying both sides of equation by "5"

\frac{x-7}{5} * 5 = 13*5\\x-7 = 65

Adding 7 on both sides of equation

x-7+7 = 65+7\\x = 72

Hence,

The equation is: \frac{x-7}{5} = 13 and the number is 72.

4 0
3 years ago
Which r-value represents the strongest correlation?<br> –0.83<br> –0.67<br> 0.48<br> 0.79
maks197457 [2]

Answer:

–0.83

Step-by-step explanation:

An r-value, or correlation coefficient, tells us the strength of the correlation in a linear regression.  This number ranges from -1 to 1; -1 is a perfect linear fit for a decreasing set of data, while 1 is a perfect linear fit for an increasing set of data.

The closer the r-value is to either -1 or 1, the stronger the correlation is.

The two negative numbers we have are -0.83 and -0.67.  The first one, -0.83, is 0.17 away from -1.  -0.67, on the other hand, is 0.33 away from -1.  The two positive numbers we have are 0.48 and 0.79.  The first one, 0.48, is 0.52 away from 1.  The second one, 0.79, is 0.21 away from 1.  The one that is closest to the perfect fit is -0.83, since it is only 0.17 away from a perfect fit.

8 0
3 years ago
Read 2 more answers
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