No equation is true when the value of x is 8
Step-by-step explanation:
The equation is true if the left hand side is equal to the right
hand side, to prove that
- Write the left hand side
- Substitute the value of x
- Find the value of the left hand side (L.H.S)
- If the answer equal the value in the right hand side (R.H.S then the equation is true at this value of x
A.
∵ 6x - 20 = 32
∴ L.H.S = 6x - 20
∵ x = 8
∴ L.H.S = 6(8) - 20 = 48 - 20 = 28
∵ R.H.S = 32
∴ L.H.S ≠ R.H.S
∴ The equation is not true when x = 8
B.
∵ 16 -
x = 12
∴ L.H.S = 16 -
x
∵ x = 8
∴ L.H.S = 16 -
(8) = 16 - 1 = 15
∵ R.H.S = 12
∴ L.H.S ≠ R.H.S
∴ The equation is not true when x = 8
C.
∵ 20 - 0.4x = 13.8
∴ L.H.S = 20 - 0.4x
∵ x = 8
∴ L.H.S = 20 - 0.4(8) = 20 - 3.2 = 16.8
∵ R.H.S = 13.8
∴ L.H.S ≠ R.H.S
∴ The equation is not true when x = 8
D.
∵
x + 12 = 30
∴ L.H.S =
x + 12
∵ x = 8
∴ L.H.S =
(8) + 12 =
+ 12 = 13.6
∵ R.H.S = 30
∴ L.H.S ≠ R.H.S
∴ The equation is not true when x = 8
No equation is true when the value of x is 8
Learn more:
You can learn more about the equations in brainly.com/question/2386054
#LearnwithBrainly
Answer: Bob has 62 cards.
All has 124 cards.
Jane has 186 cards
Step-by-step explanation:
Let x represent the number of cards that Bob has.
Al has twice as many cards as Bob. It means that the number of cards that All has is 2x.
Jane has three times as many cards as Bob. It means that the number of cards that Jane has is 3x.
Together, they have 372 cards. It means that
x + 2x + 3x = 372
6x = 372
x = 372/6
x = 62
The number of cards that Al has is
2 × 62 = 124
The number of cards that Jane has is
3 × 62 = 186
Answer:
<u>C</u> -1/2
Step-by-step explanation:
midpoint = sum of end points divide by 2.
here, midpoint = (-3+2)/2
=(-1/2)