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2 years ago

I subtract 3 from a certain number, multiply the result by 5 and then add 9

Mathematics

2 answers:

viktelen [127]2 years ago

4 0

Answer:

Step-by-step explanation:

I subtract 3 from a certain number, multiply the result by 5 and then add 9

Remember PEMDAS

(x - 3) * 5 + 9 =

5x - 15 + 9 =

5x - 6

mr_godi [17]2 years ago

3 0

Answer:

The number is 5x-6

Step-by-step explanation:

Let the number be x.

Then,

Subtracting 3,

x - 3

Multiplying by 5,

(x-3)5
5(x-3)

Adding 9:

5(x-3)+9

Solving Further:

5x-15+9
5x-6

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Combine 2y+1x=40 and y=2x using substitution

fomenos

2(2x) + 1x = 40 or 4x + 1x = 40 is the result of combining by substitution

Solution:

Given that we have to combine 2y + 1x = 40 and y = 2x using substitution method

The substitution method for solving systems of equations involves expressing one variable in terms of another, thus removing one variable from an equation.

Given equations are:

2y + 1x = 40 -------- eqn 1

y = 2x ----------- eqn 2

We can substitute eqn 2 in eqn 1

Which means, substitute y = 2x in place of y in eqn 1

2(2x) + 1x = 40

4x + 1x = 40

5x = 40

x = 8

From eqn 2,

y = 2(8)

y = 16

Thus by combining using substitution method we found the solution

3 0

3 years ago

Plz help simplify 8/10

Free_Kalibri [48]

$\frac{8}{10}$ → $\frac{4}{5}$

8 and 10 can both be divided by 2. So, 8 ÷ 2 is 4 and 10 ÷ 2 is 5.

Hope this helps :)

3 0

3 years ago

Read 2 more answers

Answer the question above.

Shtirlitz [24]

Please upload the question and i will work it out, have a lovely day!

8 0

3 years ago

A farmer sold 3/5 of his oranges to a first customer and 90 oranges to a second customer. How many oranges did he have altogethe

enyata [817]

Answer:

He had 225 oranges to start with

6 0

3 years ago

This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was tha

Pie

Answer:

The percentage that of people who gave the movie a rating between 6.8 and 8.8

P(6.8≤X≤8.8) = 83.9≅ 84 percentage

Step-by-step explanation:

Step(i):-

Mean of the Population = 8.3 points

Standard deviation of the Population = 0.5 points

Let 'X' be the random variable in normal distribution

Let X = 6.8

$Z = \frac{x-mean}{S.D} = \frac{6.8-8.3}{0.5} = -3$

Let X = 8.8

$Z = \frac{x-mean}{S.D} = \frac{8.8-8.3}{0.5} = 1$

The probability that of people who gave the movie a rating between 6.8 and 8.8

P(6.8≤X≤8.8) = P(-3≤Z≤1)

= P(Z≤1)- P(Z≤-3)

= 0.5 + A(1) - ( 0.5 -A(-3))

= A(1) + A(3) (∵A(-3)=A(3)

= 0.3413 +0.4986 (∵ From Normal table)

= 0.8399

Conclusion:-

The percentage that of people who gave the movie a rating between 6.8 and 8.8

P(6.8≤X≤8.8) = 83.9≅ 84 percentage

4 0

3 years ago