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Eva8 [605]
3 years ago
9

Simplify the expression: 7(d - 1) + 2

Mathematics
1 answer:
Alinara [238K]3 years ago
3 0

Answer: 7d-5

I hope it helps you!!!!!

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In f(x) = 2x2 − 8x − 10, the y-intercept is ? at ? and the x-intercepts are (-1, 0) and ? .
IgorLugansk [536]
<h2>1.  y-intercept</h2>

\boxed{(0,-10)}

The quadratic function f(x)=2x^22-8x-10 represents a parabola. In fact, the graph of a quadratic function is a special type of U-shaped curve called a parabola. To find the y intercept, we set x=0 as follows:

f(x)=2x^2-8x-10 \\ \\ If \ x=0 \rightarrow f(0)=-10 \\ \\ Then \ y-intercept: \\ \\ (0,-10)

<h2>2.  x-intercepts</h2>

\boxed{(-1,0) \ and \ (5,0)}

To find the other x-intercept, we must set y=0 as follows:

f(x)=2x^2-8x-10 \\ \\ If \ y=0 \rightarrow 2x^2-8x-10=0 \\ \\ Using \ the \ quadratic \ formula: \\ \\ x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \\ \\ \therefore x=\frac{-(-8) \pm \sqrt{(-b)^2-4(2)(-10)}}{2(2)} \\ \\ \therefore x_{1}=-1 \ and \ x_{2}=5

Therefore, the other x-intercept is (5,0). You can see both the y-intercept and the x-intercepts in the figure below.

8 0
3 years ago
(8 ,10) (-7 ,14) in a ti 84 calculator
SpyIntel [72]

Answer:

y=-4/15x+182/15 (12 and 2/15)

Step-by-step explanation:

Slope is 14-10/-7-8, which is 4/-15=-4/15

8 0
3 years ago
Can someone explain this for me ? :)
ruslelena [56]
34! Find the area of each of the six sides and then add them up:)
7 0
3 years ago
The probability that any postcard posted in Portugal on Monday is delivered to the UK within a week is 0.62.
sashaice [31]

Answer:

You can expect at least 9 of her postcards to arrive within a week

To find that, we multiply the number of postcards by the probability

15 x 0.62 = 9.3

Hope this helps

Good Luck

5 0
3 years ago
Select the locations on the number line to plot the points 11 /4 and 19 /4 .
KIM [24]

Answer:


Step-by-step explanation:


6 0
3 years ago
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