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tino4ka555 [31]
3 years ago
13

Increase £30 by 15% what is the answer

Mathematics
1 answer:
zheka24 [161]3 years ago
7 0
30X15=450. 450:100= 4,50. 30+4,50= 34,50
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To prove congruent triangles using ASA the order of the angles does not matter.
Tatiana [17]
What is the question
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3 years ago
What is the solution of the system of equations?
umka21 [38]

No solution of the system of equations y = -2x + 5 and -5y = 10x + 20 ⇒ 2nd answer

Step-by-step explanation:

Let us revise the types of solutions of a system of linear equations

  • One solution
  • No solution when the coefficients of x and y in the two equations are equal and the numerical terms are different
  • Infinitely many solutions when the coefficients of x , y and the numerical terms are equal in the two equations

∵ y = -2x + 5

- Add 2x to both sides

∴ 2x + y = 5 ⇒ (1)

∵ -5y = 10x + 20

- Subtract 10x from both sides

∴ -10x - 5y = 20

- Divide both sides by -5

∴ 2x + y = -4 ⇒ (2)

∵ The coefficient of x in equation (1) is 2

∵ The coefficient of x in equation (2) is 2

∴ The coefficients of x in the two equations are equal

∵ The coefficient of y in equation (1) is 1

∵ The coefficient of y in equation (2) is 1

∴ The coefficients of y in the two equations are equal

∵ The numerical term in equation (1) is 5

∵ The numerical term in equation (2) is -4

∴ The numerical terms are different

From the 2nd rule above

∴ No solution of the system of equations

No solution of the system of equations y = -2x + 5 and -5y = 10x + 20

Learn more:

You can learn more about the system of equations in brainly.com/question/6075514

#LearnwithBrainly

7 0
4 years ago
In a classroom, the ratio of pencils to erasers is 9:4. What is the fraction of the number of erasers to pencils?
jeyben [28]

Answer:

\frac{4}{9}

Step-by-step explanation:

The ratio of pencils to erasers is

9:4

Convert the ratio to a fraction.

\frac{9}{4}

The fraction is now pencils to erasers.

The fraction of the number of erasers to pencils is:

\frac{4}{9}

4 0
3 years ago
an airplane has 64 rows of seats with 3 seats in the left section 4 seats in the middle middle section and 2 seats in the right
NemiM [27]
Go 3+4+2 to determine for 1 row and then multiply that by 64 so 576
7 0
4 years ago
A set of data has 50 observations. How many classes would you recommend?​
nignag [31]

Answer:

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Step-by-step explanation:

If k is the number of classes and n is the number of observations, then for number of classes we should select the smallest k such that 2^k > n.

<u>We have n = 50 and:</u>

  • 2^5 = 32 < 50
  • 2^6 = 64 > 50

As per above described 2 to k rule, we are taking k = 6.

So 6 classes should be used.

6 0
3 years ago
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