Answer:
The solution of the system of equation are (10,15).
Step-by-step explanation:
The given two linear two variable equations are
- x - 2y = - 40 ........ (1) and
x + 4y = 70 .......... (2)
Now,adding thoes two equations (1) and (2) we get,
- 2y + 4y = - 40 + 70
⇒ 2y = 30
⇒ y = 15.
Now, putting y = 15 in the equation (2), we get,
x = 70 - 4y = 70 - 4(15) = 10
Therefore, the solution of the system of equation are (10,15). (Answer)
X^2+10x+16＝0
First, you find factors of 16.
1 x 16
2 x 8
4 x 4
Next, you find which of the factor pairs adds up to 10 (from the 10x). In this case, 2 x 8 because 2 times 8 is 16 and 2 plus 8 is 10.
Then, the equation will be written out as: (x+2) (x+8). Take those two equations and set them equal to 0, and then solve.
x+2＝0
-2 -2
x＝-2
x+8＝0
-8 -8
x＝-8
So, your answers are x＝-2 and x＝-8. You can check by plugging in those two numbers as x.
N=-3/20
In decimal form it would be n=-0.15
Answer:
The Domain is X, range is Y
Step-by-step explanation:
Domain and Range is just another term for X-axis and Y-axis
Answer:
$839.95
Step-by-step explanation:
Sales tax = 7 % × cost
Sales tax = 0.07 × 785
Sales tax = $54.95
=====
Cost = price + sales tax
Cost = 785 + 54.95
Cost = $839.95
The cost to purchase is $839.95.
