3b - 7 < 32
=> 3b < 32 + 7
=> 3b < 39
=> b < 39÷ 3
=> b < 13
Hope it helps !!!
Pasos
3(3−1)
Usa la propiedad distributiva para multiplicar 3 por 3−1.
(3)2−3
El cuadrado de 3 es 3.
3−3
B
Pasos
5(10+2)
Usa la propiedad distributiva para multiplicar 5 por 10+2.
510+52
Factorice 10=5×2. Vuelva a escribir la raíz cuadrada del producto 5×2 como el producto de las raíces cuadradas 52.
552+52
Multiplica 5 y 5 para obtener 5.
52+52
Para multiplicar 5 y 2, multiplique los números bajo la raíz cuadrada.
52+10
Q1,
A)30 : 3
B)300:3
Q2
A)x=35
B)x=12
Q3
5
Answer: 160 liters of the
40% solution and 80 liters of the 70% solution will be used.
Step-by-step explanation:
Let x represent the number of liters of 40% antifreeze solution that should be used.
Let y represent the number of liters of 70% antifreeze solution that should be used.
The volume of the mixture to be mixed is 240 liters. It means that
x + y = 240
The 40% antifreeze solution is to be mixed with a 70% antifreeze
solution to get 240 liters of a 50% solution. This means that
0.4x + 0.7y = 0.5(240)
0.4x + 0.7y = 120 - - - - - - - - - - - -1
Substituting x = 240 - y into equation 1, it becomes
0.4(240 - y) + 0.7y = 120
96 - 0.4y + 0.7y = 120
- 0.4y + 0.7y = 120 - 96
0.3y = 24
y = 24/0.3
y = 80
x = 240 - y = 240 - 80
x = 160
Answer:
1. yes
2. no
3. yes
4. yes
5. no
Step-by-step explanation:
