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9966 [12]
3 years ago
15

Which expression has a value of 15 when n = 7? 43 - 5n 3n - 5 6n - 28 19 - 28/n

Mathematics
2 answers:
cupoosta [38]3 years ago
8 0
19 - 28/n
n=7
19 - 28/7
19 - 4
=15
Leya [2.2K]3 years ago
5 0

Answer:

19-\frac{28}{n}\text{has a value of 15 when n=7}

Step-by-step explanation:

Given the following expressions

we have to choose the expression which has a value 15 when n is 7

Option 1: 43-5n

Put n=7,

43-5(7)=43-35=8

Option 2: 3n - 5

3(7)-5=21-5=16

Option 3: 6n-28

6(7)-28=42-28=14

Option 4: 19-\frac{28}{n}

19-\frac{28}{7}=19-4-15

\text{Hence, }19-\frac{28}{n}\text{has a value of 15 when n=7}

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The solids are similar. Find the surface area of the red solid.
alisha [4.7K]

Answer:

756

Step-by-step explanation:

The ratio of areas is the square of the scale factor.

First, we find the scale factor from the blue solid to the red solid.

scale factor = 6/4 = 3/2

The ratio of areas is the square of the scale factor:

ratio of areas = (3/2)^2 = 9/4

volume of red solid = volume of blue solid * ratio of areas

volume of red solid = 336 m^2 * 9/4 = 756 m^2

Answer: S = 756 m^2

8 0
3 years ago
Round or compatible 198 add 727 to the estimate sum
uranmaximum [27]
Lets break this down here.

First- 198 rounded would be 200
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3 0
3 years ago
The product of two consecutive positive integers is 29 more than their sum. Find the integers
Rina8888 [55]
The consecutive positive integers would be: x and (x+1),
We would have to solve the following equation to find these numbers:
x(x+1)-[x+(x+1)]=29
x²+x-2x-1=29
x²-x-30=0
x=[1⁺₋√(1+120)]/2
x=(1⁺₋11)/2
We have two possible solutions:
x₁=(1-11)/2=-5    then: (x+1)=-5+1=-4  This is not the solution.
x₂=(1+11)/2=6    then: (x+1)=6+1=7    This solution is right.

Answer: the numbers would be 6 and 7. 
7 0
3 years ago
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katrin [286]

Answer:

5h-2

Step-by-step explanation:

It is the correct answer

5 0
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Answer:

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Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
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