Answer:
I think it's -13
Step-by-step explanation:
Answer:
3.4 pizzas
Step-by-step explanation:
Given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon
y represents number of pizzas sold and x number of coupons issued
y is marked verticaly and x horizontally
The trend line is given as
y =3.4x+43
This says that even when no coupon is issued pizzas sold will be 43
and rate of change of pizza sold for 1 unit of coupon = slope = 3.4
i.e. when x increases by 1 unit y increases by 3.4 units
Hence For each additional coupon issued 3.4 pizzas more will be sold
Answer:
30
Step-by-step explanation:
15cm for 5
5 x 2=10
15 x 2 = 30
<h3>Answer:</h3>
±12 (two answers)
<h3>Explanation:</h3>
Suppose one root is <em>a</em>. Then the other root will be -3<em>a</em>. The product of the two roots is the ratio of the constant coefficient to the leading coefficient:
(<em>a</em>)(-3<em>a</em>) = -27/4
<em>a</em>² = -27/(4·(-3)) = 9/4
<em>a</em> = ±√(9/4) = ±3/2
Then the other root is
-3<em>a</em> = -3(±3/2) = ±9/2 . . . . . . the roots will have opposite signs
We know the opposite of the sum of these roots will be the ratio of the linear term coefficient to the leading coefficient: b/4, so ...
-(a + (-3a)) = b/4
2a = b/4
b = 8a = 8·(±3/2)
b = ±12
_____
<em>Check</em>
For b = 12, the equation factors as ...
4x² +12x -27 = (2x -3)(2x +9) = 0
It has roots -9/2 and +3/2, the ratio of which is -3.
For b = -12, the equation factors as ...
4x² -12x -27 = (2x +3)(2x -9) = 0
It has roots 9/2 and -3/2, the ratio of which is -3.
Answer:
4/5
Step-by-step explanation:
The slope is the constant rate of change, defined as m in the equation y=mx+b for slope-intercept form. Therefore, 4/5 is the constant rate of change.