If we round the two values (49 and 805) to numbers more easily worked with and use this product as an estimate we can see 3 165 is much to small
If we round 49 to 50 and 805 to 800 and observe the product of these two values we see an estimate of 40 000
This number is vastly larger than 3 165 so therefore the estimate shows that her answer is not reasonable
Answer:
Option B
Step-by-step explanation:
Given the corrected equations from the comment:
Y = -1/2x - 1
Y = 1/4x - 4
(I am assuming from the answer choices that the 1/2 is negative)
Use a graphing tool to graph the given equations.
When graphed, the lines pass the point (4, -3).
See graph below.
Option B should be the correct answer.
Hope this helps.
Answer:
Explanation:
-4y - 3x = -11 (1)
x - 2y = 17 (2)
x = 17 + 2y
Substitute x value in (1)
-4y - 3(17 + 2y) = -11
-4y - 51 - 6y = -11
-10y - 51 = -11
-10y = -11 + 51
-10y = 40
y = 40/-10
y = -4
Substitute the y value in (2)
x - 2(-4) = 17
x + 8 = 17
x = 17 - 8
x = 9
Therefore, x = 9 and y = -4
Answer:
-15
Step-by-step explanation:
y = (x+5)^2 + 5
y = x^2 +10x +25 +5
y = x^2 +10x +30
.
You know this is a parabola. So find several values of x to calculate values of y.
.
The axis of symmetry is where x = -b/2a.
-10/2 = -5
.
The vertex is where the parabola ends. It occurs on the axis of symmetry.
y = (-5)^2 +10(-5) + 30
y = 25 -50 + 30
y = 5
.
Pick several points to either side of the vertex.
x = -4, y = 6
x = -6, y = 6
x = 0, y = 30
x = -10, y = 30
x = 5, y = 105
x = -15, y = 105
Answer:
So K + L + T = 682. So Lou has 62 songs on his device. If Kelly has four times the number of songs that Lou has, then she has 4 x 62 = 248 songs. If Tiffany has six times the number of songs that Lou has, then she has 6 x 62 = 372 songs.
Step-by-step explanation: