Answer:
x=3 + y=3 =6
Step-by-step explanation:
first you have to find out what can equal 6 and 3 plus 3 equals 6 so that's your answer
Let a and b = the numbers we must find.
a + 2b = 5.....Equation A
2a + b = 13.......Equation B
We have a system of equations in two variables.
I will solve A for little a.
a + 2b = 5
a = 5 - 2b
Now I will plug 5 - 2b for a in B.
2(5 - 2b) + b = 13
10 - 4b + b = 13
-3b = 3
b = -1
To find a, replace b with -1 in EITHER A or B.
I will use Equation A.
a + 2b = 5
a + 2(-1) = 5
a - 2 = 5
a = 7
The two numbers are -1 and 7.
Understand?
Step-by-step explanation:
-x+2y=-6
x-2y=6
x=2y+6
substitute in 2x-3y=11 gives us 2(2y+6)-3y=11
4y+12-3y=11
y=-1
-x+2(-1)=-6
-x=-4
x=4
The answer is C hope that helps
Answer:
42
Step-by-step explanation:
the 2 part of the ratio refers to 14 girls , then
14 ÷ 2 = 7 ← value of 1 part of the ratio , so
4 parts = 4 × 7 = 28 ← number of boys
total members = 14 + 28 = 42