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Mkey [24]
3 years ago
15

If a(9,18) and b(1,12) find

Mathematics
1 answer:
galina1969 [7]3 years ago
6 0
AB= \sqrt{(9-1)^2+(18-12)^2} = \sqrt{8^2+6^2}= \sqrt{64+36} = \sqrt{100}=10
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Use the substitution method to solve the system of equations.
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Insert 3x - 7 for y in 15x - 5y = 14
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5 0
3 years ago
The ratio of boys to girls in a group is 4:1. If there are 33 more boys than girls, work out how many people there are in total.
MissTica

Total number of people is 55

<u>Step-by-step explanation:</u>

Step 1:

Given ratio between boys and girls is 4:1. Let number of girls be x, so number of boys = 33 + x

⇒ 4x + x = x + 33 + x

⇒ 5x = 33 + 2x

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Step 2:

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7 0
3 years ago
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The product of 2 and a number x is 3/4 .
Vikki [24]

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3 0
3 years ago
use a system of linear equations with two variables and two equations to solve. a number is 11 more than another number. twice t
Eva8 [605]

The value of required two numbers x and y are 7 and -4 respectively. These values are find out using Elimination method.

Let the required first number and second numbers be x and y respectively .

We have given that, one Number is more than other by 11

i.e., the difference of two numbers is equal to 11

x - y = 11. …..(1)

And twice the sum of the two numbers is 6 i.e.,

2(x + y) = 6 => 2x + 2y = 6 => x +y = 3 …….(2)

Now , equation (1) and (2) are linear equation with two variables x and y .

We shall solve above two equations and find out the value of two variables. Using Elimination method , In which value of one variable is find out by eliminate the second variable through their coefficient comparison.

Added the equation ( 1) and (2) we get, 2x = 14 => x = 7

Put the value of x in equation (1) we get,

7 – y = 11 => y = -4

Thus, we get the values of two variables x and y is 7 and -4 respectively.

To learn more about linear equation, refer:

brainly.com/question/21243732

#SPJ4

7 0
11 months ago
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