What is 40% of 50,000
1 answer:
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Answer:
x = - 2.5
Step-by-step explanation:
Given that the sketch represents
y = x² + bx + c
The graph crosses the y- axis at (0 , - 14), thus c = - 14
y = x² + bx - 14
Given the graph crosses the x- axis at (2, 0), then
0 = 2² + 2b - 14
0 = 4 + 2b - 14 = 2b - 10 ( add 10 to both sides )
10 = 2b ( divide both sides by 2 )
b = 5
y = x² + 5x - 14 ← represents the graph
let y = 0 , then
x² + 5x - 14 = 0 ← in standard form
(x + 7)(x - 2) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 7 = 0 ⇒ x = - 7
x - 2 = 0 ⇒ x = 2
The x- intercepts are x = - 7 and x = 2
The vertex lies on the axis of symmetry which is midway between the x- intercepts, thus
the x- coordinate of the turning point is =
= - 2.5
<span>To complete
the steps to demonstrate why you multiply by the reciprocal when
dividing fractions.
To find
Step 1:
Rewrite it as
.
Step 2:
Multiply the numerator and the denominator by the reciprocal of
.</span><span>
</span><span>
Step 3:
Simplify the denominator
Step 4:
Simplify the fraction
</span><span>
.
We complete the solution as follows:
</span><span><span>
</span></span>
To find
Step 1:
Rewrite it as
Step 2:
Multiply the numerator and the denominator by the reciprocal of
</span><span>
Step 3:
Simplify the denominator
Step 4:
Simplify the fraction
</span><span>
We complete the solution as follows:
</span><span><span>