MATHEMATICS MIDDLE SCHOOL

Which expression has a value of 15 when n = 7? 43 minus 5 n 3 n minus 5 6 n minus 28 19 minus StartFraction 28 Over n EndFraction

Answers

Answer 1

Answer:

Answer:

$19-(28)/(n)$ is the expression with value of 15 when n = 7.

Step-by-step explanation:

To find the expression whose value is 15, substitute the value of n = 7 in each given expression.

Expression 1:

$43-5n$

Substituting the value of n,

$43-5\left(7\right)$

Simplifying,

$43-35=8$

Since the value of the expression is 8 which is not equal 15.

Hence expression $43-5n$ does not have value of 15 when n = 7.

Expression 2:

$3n-5$

Substituting the value of n,

$3\left(7\right)-5$

Simplifying,

$21-5=16$

Since the value of the expression is 16 which is not equal 15.

Hence expression $3n-5$ does not have value of 15 when n = 7.

Expression 3:

$6n-28$

Substituting the value of n,

$6\left(7\right)-28$

Simplifying,

$42-28=14$

Since the value of the expression is 14 which is not equal 15.

Hence expression $6n-28$ does not have value of 15 when n = 7.

Expression 4:

$19-(28)/(n)$

Substituting the value of n,

$19-(28)/(7)$

Simplifying,

$19-4=15$

Since the value of the expression is 15 which is equal 15.

Hence expression $19-(28)/(n)$ has the value of 15 when n = 7.

Answer 2

Answer:

Final answer:

Upon substituting n = 7 into each of the four mathematical expressions given in the question, the expression '19 - 28/n' evaluates to 15. Hence, '19 - 28/n' is the answer.

Explanation:

To find out which expression equals to 15 when n = 7, we substitute n = 7 into each of the given expressions and evaluate them:

43 - 5n becomes 43 - 5(7) = 43 - 35 = 8,
3n - 5 becomes 3(7) - 5 = 21 - 5 = 16,
6n - 28 becomes 6(7) - 28 = 42 - 28 = 14,
19 - 28/n becomes 19 - 28/7 = 19 - 4 = 15.

Therefore, the expression '19 - 28/n' evaluates to 15 when n = 7.

Learn more about Algebra Expressions here:

brainly.com/question/34192827

#SPJ3

Related Questions

Please help! Will give Brainliest!Christina wants to compute the cost of tiling the floor in her bathroom. The floor measures 7 feet 6 inches by 8 feet 10 inches. Each tile covers 1 square foot. A box of 45 tiles costs $35.95. How many boxes must she buy to cover the floor?A. 1 boxB. 2 boxesC. 3 boxesD. 4 boxes
Can anybody help me with this question please ?
Please do 13 ive been trying for 3 hour pls solve x
Which point is located at (2, 3)?1 A2 B3 C4 D
Consider the dot plot which shows the distribution of data collected on the number of pets at home. Which statement BEST describes the center of the data collected?A) The mean is greater than the middle value of the range. B) The median is greater than the middle value of the range. C) The mean is closer to the middle value of the range than the median. D) The median is closer to the middle value of the range than the mean.

3x-2 less than or equal than 7

Answers

What is x equal to? We would have to find the actual value to compare. No variable.

Factor the. expression x^2+ 18x +80

Answers

Answer:

$(x + 10)(x+8)\n$

Step-by-step explanation:

Step 1: Factor

$x^2+10x+8x+80$

$(x + 10)(x+8)\n$

Answer: $(x + 10)(x+8)\n$

Step-by-step explanation:

x²+18x+80= 0

x²+10x+8x+80=0

x(x+10) +8(x+10)=0

(x+10)(x+8)=0

Jerry bought 4 DVDs for 25.20 what was the unit rate

Answers

Based on the information given the unit rate is: $6.30.

Unit rate:

Using this formula

Unit rate=Cost/Number of DVDs

Where:

Cost=25.20

Number of DVDs=4

Let plug in the formula

Unit rate=25.20/4

Unit rate=$6.30

Inconclusion the unit rate is: $6.30.

Learn more about unit rate here:brainly.com/question/4895463

If 4 DVDs cost $25.20, then 1 DVD costs $(25.20)/(4)$ =$6.30.

In an experiment, the weight of several oranges were recorded in the table below. During the experiment, some of the oranges were weighed in grams and some were weighed in kilograms. Find the weights of the oranges weighed in grams in kilograms, and then find the weights of the oranges weighed in kilograms in grams.

Answers

I don't think anyone can solve this without seeing the table mentioned in the question :)

Jessica has twice as many books as Andrew. Together, they have 36 books. How many books does Jessica have?

Answers

Answer:

Step-by-step explanation:

Final answer:

To find the number of books Jessica has, we can set up the equation x + 2x = 36, where x represents the number of books Andrew has. Solving the equation, we find that Andrew has 12 books, and Jessica has 24 books.

Explanation:

To find the number of books Jessica has, let's assign a variable to Andrew's books. Let's say Andrew has x books. According to the problem, Jessica has twice as many books as Andrew, so she has 2x books. Together, they have 36 books, so we can set up the equation: x + 2x = 36. Combining like terms, we get 3x = 36. Dividing both sides of the equation by 3, we find that x = 12. Therefore, Andrew has 12 books, and Jessica has 2 * 12 = 24 books.

Learn more about equations here:

brainly.com/question/33359365

#SPJ2

The center of a soccer field has an area of 100 $\pi$ m squared. Find the circumference of the center circle.

Answers

The formula for the area of a circle is A=πr². To find the circumference, we must find the radius, r. To do this, we plug in the area for A in the first formula, then plug it in to the circumference formula:
$100 \pi = \pi r^(2) \n (100 \pi )/( \pi ) = ( \pi r^(2) )/( \pi ) \n 100= r^(2) \n √(100)= \sqrt{r^(2) } \n r=10m$

Now we know that r=10 meters. Now we plug this into the circumference formula, C=2πr.
$C=2 \pi 10 \n C=20 \pi$

The answer is 20π meters.

Hope this helps!

Other Questions

Evaluate the expressions 3x-2 and 4x+4 for the following value of x.

What is 1/2 - 1/6? Please give answer. From Shylalilac!

Three of the bedrooms in Lana’s house are rectangular, each 101/2 feet by 111/4 feet, What is the least amount of carpeting needed to completely cover the three floors?

What property is shown? –12 + (27 + 12) = –12 + (12 + 27)A.associative propertyB.commutative propertyC.distributive propertyD.opposite of a sum property