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aleksandr82 [10.1K]
3 years ago
9

81.9 is 90% of what number

Mathematics
1 answer:
makvit [3.9K]3 years ago
5 0
0.9n=81.9
n=91.......
☺☺☺☺
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Part A
OLEGan [10]

Part A: The algebraic equation for the situation is 2x - 3 = 5

Part B:  Bob has 4 brand new music CD's

Step-by-step explanation:

Translate the situation into an algebraic equation:

  • Ann has 5 brand new music CD’s, which is 3 less than twice the amount that Bob (x) has
  • Find the value of x (the number of brand new CD's Bob has)

Part A:

∵ Bob has x brand new CD's

∵ Ann has 5 brand new music CD’s, which is 3 less than twice

  the amount that Bob has

- That means multiply x by 2 and then subtract 3 from the product

  and equate the answer by 5

∵ Twice x 2x

∵ 3 less than twice x = 2x - 3

∴ 2x - 3 = 5

The algebraic equation for the situation is 2x - 3 = 5

Part B:

Let us solve the equation to find the value of x

∵ 2x - 3 = 5

- Add 3 to both sides

∴ 2x = 8

- Divide both sides by 2

∴ x = 4

Bob has 4 brand new music CD's

Learn more:

You can learn more about the algebraic expressions in brainly.com/question/1600376

#LearnwithBrainly

5 0
3 years ago
Find the output, y, when the input, x, is -9
Misha Larkins [42]

Answer:

The output of y = 1

Step-by-step explanation:

7 0
3 years ago
Find the measure of line segment MK. K 8 I 7 J M 5 2x+1<br>​
mrs_skeptik [129]

Hello!

This is a problem about relating circle theorems to line lengths.

We can first see that both line segment MK and CM are secants within the circle that come from a common point K.

This means that the Intersecting Secant Theorem applies here.

The Intersecting Secant Theorem states that if two secants are formed from a common point outside the circle, the length of each secant multiplied by the length of its corresponding external secant are equivalent.

We can set up the following equation.

8(8+x+5)=7(7+2x+1)

8(x+13)=7(2x+8)

8x+104=14x+56

6x=48

x=8

Using this value, we can find the length of line segment MK.

MK=x+5+8

MK=8+5+8

MK=21

Hope this helps!

5 0
3 years ago
The average annual salary for 35 of a company’s 1200 accountants is $57,000. This describes a parameter.
zzz [600]
Yes it describes only a parameter because <span>a numerical characteristic of a population, as distinct from a statistic of a sample was use. only 35 out of the 1200 accountants salary was used in calculating an average salary. it will be real if use all the number of accountant in calculating the average salary</span>
8 0
3 years ago
For all of a and b, 3a (a + 2b)-b (2a-3b)​
Yuliya22 [10]

Answer:

3a^2 + 4ab + 3b^2

Step-by-step explanation:

just trust me bro :)

6 0
2 years ago
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