Answer: 6
Step-by-step explanation:
For 16/18 it would be 8/9
For 10/15 it would be 2/3
Answer:
no
Step-by-step explanation:
Proportional must go through (0,0)
0 = 2(0) +7
0 = 7
This is not true so this is not proportional
Answer:
2. x = 2 & y = 4
3. x = 4 & y = 2
Step-by-step explanation:
2. x + y = 6
2x + y = 8 (multiply the first equation by -1, so you can eliminate the ys)
- x - y = -6
2x + y = 8 (now add the variables together)
x = 2 (plug in x in one of the equations to find out y)
x + y = 6
(2) + y = 6
-2 -2
y = 4
3. 3x + y = 14
x = 2y (plug in x into the first equation and solve it for y)
3(2y) + y = 14
6y + y = 14
7y = 14
y = 2 (plug in y in one of the equations to find out x)
x = 2y
x = 2(2)
x = 4
4. One number (x) is 2 more (+2) than twice (times 2) as large as another. their sum is 17. Find the numbers.
2x + 2 = 17 (solve for x)
-2 -2
2x = 15
x = 7.5
6. 7 (4x + 1) - (x + 6) (start by distributing 7 into the first parenthesis)
(28x + 7) - (x + 6) (do the same to the other parenthesis by distributing -1)
(28x + 7) (-x - 6) (and now just combine like terms)
28x + 7 - x - 6
28x - x + 7 - 6
27x + 1
i hope this helped! if you have any question, pls let me know!
Step-by-step explanation:
Vamos resolver sua equação passo a passo.
10-7c=10+2(3-5c)
Etapa 1: simplifique os dois lados da equação.
10-7c=10+2(3-5c)
10+-7c=10+(2)(3)+(2)(-5c)(Distribuir)
10+-7c=10+6+-10c
-7c+10=(-10c)+(10+6)(Combine os termos semelhantes)
-7c+10=-10c+16
-7c+10=-10c+16
Etapa 2: adicione 10c a ambos os lados.
-7c+10+10c=-10c+16+10c
3c+10=16
Etapa 3: subtraia 10 de ambos os lados.
3c+10-10=16-10
3c=6
Etapa 4: divida os dois lados por três.
3c
3
=
6
3
c=2
