40 by 4 = 160
20 by 4 =80
160-80=80
Answer:
D. (-3/8) (-5/7) (-1/4)
Step-by-step explanation:
Hints:
- * - * + = +
+ * - * - = +
+ * + * + = +
- * - * - = -
A. (-3/8)(-5/7)(1/4)
= (-3*-5*1) / (8*7*4)
= 15/224
B. (3/8)(-5/7)(-1/4)
= (3*-5*-1) / (8*7*4)
= 15/224
C. (3/8)(5/7)(1/4)
= (3*5*1) / (8*7*4)
= 15/224
D. (-3/8) (-5/7) (-1/4)
= (- 3*-5*-1) / (8*7*4)
= (-15)/(224)
= -15/224
The correct option is
D. (-3/8) (-5/7) (-1/4)
Answer:
Sarah runs at 14.4km/h
Step-by-step explanation:
36km = 2.5 hours
/ = per or divide
36km/2.5hours = 36 divided by 2.5 = 14.4km/h
Answer:
There's no real solutions to this expression.
Step-by-step explanation:
5x - (3 - 2x) = - (-x - 7) + 6x
- First we need to get rid of the parenthesis and to do that we multiply inside the parenthesis with -1
5x - 3 + 2x = x + 6 + 6x (remember, negative × negative = positive)
- Now add/subtract like terms:
5x + 2x - 3 = 7x - 3
x + 6x + 7 = 7x + 7
7x - 3 = 7x + 7, 7x will eliminate each other so we will be left with,
-3 = 7 which cannot be true so we say there's no real solutions to this expression.
Answer:
c
Step-by-step explanation: