Answer:
x = 6
Step-by-step explanation:
4x - 3 = 7×3
4x - 3 = 21
4x = 21 + 3
4x = 24
x = 6
I hope you understood the explanation!
Answer:
1.6 litre of milk is left
Answer:
True.
Step-by-step explanation:
It is because it is in the form
and this equals
.
Why it is in that form: well comparing
, we have
. Testing, plug in those values:


.
This has the squared form of
.
Test if you like:


Use foil to expand:
First: x(x)=x^2
Outer: x(1)=x
Inner: 1(x)=x
Last: 1(1)=1
---------------Add together

It does indeed equal.
Answer:
A
Step-by-step explanation:
there is a common ratio between consecutive terms , that is
- 12 ÷ - 3 = - 48 ÷ - 12 = - 192 ÷ - 48 = 4
this indicates the sequence is geometric with nth term
= a₁ 
where a₁ is the first term and r the common ratio
here a₁ = - 3 and r = 4 , then
a₈ = - 3 ×
= - 3 × 16,384 = - 49,152
50,000 is the nearest ten thousand.