Answer:
<u>The ordered pair of the solution is (0.022, -0.55). None of the alternatives given we can consider as the best estimate because there isn't at least one positive value for x, when it's actually positive. Picking (0, -2) as the best estimate is also far from the best estimate.</u>
Step-by-step explanation:
Let's solve the system of equations:
y = −25x
−2y = 5x+1
***********************
Substituting y in the 2nd equation:
-2 (-25x) = 5x + 1
50x = 5x + 1
45x = 1
x = 1/45
x = 0.022
**********************
Solving for y in the 1st equation:
y = -25 (0.022)
y = - 0.55
<u>The ordered pair of the solution is (0.022, -0.55). None of the alternatives given we can consider as the best estimate because there isn't at least one positive value for x, when it's actually positive. Picking (0, -2) as the best estimate is also far from the best estimate.</u>
Answer:
perpendicular
Step-by-step explanation:
The standard form of equation of a line is expressed as y = mx+c
m is the slope
c is the intercept
For the line Y= -1/2x-11
Compare
mx = -1/2x
m = -1/2
slope = -1/2
For the equation
16x-8y=-8
Divide through by 8
2x - y = -1
- y = -2x-2
y = 2x+2
Compare
mx = 2x
M = 2
Take the product of the slopes
Mm = -1/2 * 2
Mm = -1
Since the product of their slope is -1, hence the two lines are perpendicular
Answer:
The answer is 8
Step-by-step explanation:
2 + 6 = 8
make me brainliest
Answer:
2 real solutions
Step-by-step explanation:
To determine the nature of the solutions use the discriminant
Δ = b² - 4ac
• If b² - 4ac > 0 then 2 real solutions
• If b² - 4ac = 0 the 2 real and equal solutions
• If b² - 4ac < 0 then no real solutions
Given
x² + 9x + 20 = 0 ← in standard form
with a = 1, b = 9, c = 20, then
b² - 4ac
= 9² - (4 × 1 × 20 ) = 81 - 80 = 1
Since b² - 4ac > 0 then there are 2 real solutions