Answer:
x= 1.5, y= 3.5
or x= -5, y= 10
Step-by-step explanation:
Let's solve by substitution.
Label the two equations:
y= 2x² +6x -10 -----(1)
y= -x +5 -----(2)
Substitute (2) into (1):
2x² +6x -10= -x +5
2x² +6x +x -10 -5= 0
Simplify:
2x² +7x -15= 0
Factorise:
(2x -3)(x +5)= 0
2x -3= 0 or x +5= 0
2x= 3 or x= -5
x= 1.5
Now that we have found the value of x, we can find the value of y through substitution.
Substitute into (2):
y= -1.5 +5 or y= -(-5) +5
y= 3.5 or y= 10
Supplementary:
Do check out the following should you wish to learn more about solving quadratic equations!
Answer: the anser is
Step-by-step explanation:
9/24= 0.375 0.375x40=15
w=15 liters
5^-3 is 1/125
The negative in the exponent makes it so there is a 1 over the problem if there was no negative. When you have a negative in the exponent, the answer will be the reciprocal (opposite) of the question with no negative.
For example,
9^2 = 81
9^-2 = 1/81
OK so basically you will times 90 by 6% which will give you $95.40
Answer:
Step-by-step explanation:
This figure is quarter of a circle.
=> Perimeter = π/2r + 2r
=> 5π + 10
=> 5(3.14) + 10
=> 15.7 + 10
=> 26 units
Area = πr²/4
=> 3.14 x 100 / 4
=> 25 x 3.14
=> 79 sq. units
