Answer:
3 and 1/2.
Step-by-step explanation:
1/2 times 7 = (7 times 1) / 2 = 7 / 2 = (6 + 1) / 2 = 3 and 1/2.
Hope this helps!
For this problem I would change:
2x + 3y = 25 into
-2x - 3y = -25
Then, I would add up both equations by lining them up top of another.
5x + 3y = 31
+ -2x - 3y = -25
3x = 6
x = 2
Now that you have x, solve for y.
5x + 3y = 31
5(2) + 3y = 31
10 + 3y = 31
3y = 21
y = 7
So, x is 2 and y is 7.
Check to see if the values are correct by plugging them into the other equation.
2x + 3y = 25
2(2) + 3(7) = 25
4 + 21 = 25
25 = 25
Since the values are correct, the solution to this problem is A (2, 7).
This works because she added the number to she if she got right
A technique of expressing an equation in the most efficient form possible while altering the quality of the underlying statement is known an algebraic equation.
<h3>Simplifying the given expression:</h3>
⇒ (- 20 - 3i) - (- 22 - 1i)
⇒ (- 20 - 3i + 22 + 1i)
⇒ (2 - 2i)
Therefore the simplification of the given expression is "(2 - 2i)"
Find out more about the expression here:
brainly.com/question/2059524
Answer:
2442
Step-by-step explanation:
The n th term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d is the common difference
We require to find d knowing that 120 is the 44 th term, thus
= - 9 + 43d = 120 ( add 9 to both sides )
43d = 129 ( divide both sides by 43 )
d = 3
The sum to n terms of an arithmetic sequence is
= [ 2a₁ + (n - 1)d ], hence
= [ (2 × - 9 + (43 × 3) ]
= 22(- 18 + 129)
= 22 × 111 = 2442
OR
Since the first and last terms in the sequence are known, then
= ( first + last )
= 22(- 9 + 120) = 22 × 111 = 2442