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ra1l [238]
3 years ago
10

10x = -71 - 11y3x = -7 + 11y

Mathematics
2 answers:
lyudmila [28]3 years ago
6 0
(-6,-1) is the answer to your question.
WINSTONCH [101]3 years ago
5 0

If we add theses 2 equations we eliminate the y terms ( -11y + 11y = 0):-


so adding we get


13x = -78

x = -6


Substitute x = -6 in the first equation:-


10(-6) = -71-11y

11y = -71 + 60 = -11

y = 1


So the solution to the system of equations is x = -6,y = 1

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What step do u preform first when evaluating the expression 3 + (18 - 6) + 20 divided by 4
Elena L [17]

Answer:

Step-by-step explanation:

=3+(18-6)+20÷4

=3+12+20÷4

=3+12+5

=20

use BODMAS rule (Bracket of Division, Multiplication, Addition, and Subtraction)

5 0
2 years ago
Read 2 more answers
4) You and a friend go out for lunch. Each of you paid $6.50 for the meal including a 6% sales tax.
noname [10]

Answer:6:11

Step-by-step explanation:

I hope this helps

8 0
3 years ago
The ratio of boys to girl in a school is 5:7 if there are 600 students, how many girls are there
larisa86 [58]

Answer:

350 girls

Step-by-step explanation:

So,

The secret to solving problems with ratios is to find the value of one unit.

5:7 = 12 units total

To find one unit, divide the total number of students by the total number of units.

600/12 = a

Simplify

50/1 = a

50 = a

The value of each unit is 50.

Now, multiply the units by the numbers in the ratio.

50(5) = b

250 = boys

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350 = x

There are 350 girls.

3 0
2 years ago
Among 500 freshmen pursuing a business degree at a university, 311 are enrolled in an economics course, 243 are enrolled in a ma
Allushta [10]

Solution :

Let A = Economics, B = Mathematics

n(A) = 311, n(B) = 243, $n(A \cap B) = 135$

a). So, $n(A \cup B) = n(A) +n(B) - n(A \cap B)$

                     = 311 + 243 - 135

                     = 419

b). n(A only) = 311 - 135

                   = 176

     n(B only) = 243 - 135

                   = 108

Exactly one of these two courses

  $=\frac{176+108}{500}$

  = 0.568

c). Neither economics nor mathematics

    $=\frac{500-419}{500} $

  $=\frac{81}{500}$

 = 0.162

7 0
3 years ago
Find the value of the missing angles in the following figures
Veseljchak [2.6K]

Answer:

ans: ii) 87° and iii) 60°

Step-by-step explanation:

ii)

y° = 180° - ( 56° + 37°)

missing angle on triangle is alternate angle of y° so are equal and sum of angles of triangle is 180°

iii)

x° + 2x° = 180°

sum of co interior angles is 180°

7 0
3 years ago
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