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Darina [25.2K]
3 years ago
6

Factorise this pleasee x2 + 4x -45

Mathematics
1 answer:
Luden [163]3 years ago
4 0

Answer:

(x - 5)(x + 9)

Step-by-step explanation:

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A graph of a linear function is shown on the grid. Which of these best represents 0 of the function? A 8. B 10. C 16. D 24.
harina [27]

answer:

C. 16

explanation:

when x is 0, the y-intercept is 8

coordinates: (0,8) and (4,6)

slope:

\sf \frac{y2-y1}{x2-x1}

\sf \frac{6-8}{4-0}

\sf \frac{-2}{4}

\sf -\frac{1}{2}

equation:

\sf y = mx +b    [ where m is slope and b is y-intercept ]

y = \sf -\frac{1}{2}x +8

solve for x-intercept:

note: zeros of a function are the values of x when f(x) is equal to 0

y = \sf -\frac{1}{2}x +8

0= \sf -\frac{1}{2}x +8

-8= \sf -\frac{1}{2}x

\sf x = -8 * -2

\sf x = 16

3 0
3 years ago
Read 2 more answers
Find the measure of angle ADE.
Kaylis [27]
The answer is 135 degrees as 45 add 135 equals 180 degrees as it's a straight line
8 0
3 years ago
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Vertex and axis of symmetry f(x)=2x^2-16x-17<br> PLEASE HELP
Law Incorporation [45]
The vertex is at (4, -49) and the axis of symmetry is at x= 4.

To find the vertex of this equation, use this method: ( \frac{-b}{2a})

a=2
b=-16

This will help get your x value and the axis of symmetry. To find the y value of the vertex, insert the x value, 4 to get your y value, -49.
8 0
3 years ago
Guys i need help again lol
tresset_1 [31]

Answer:

the answer to this question can be option B

6 0
3 years ago
Hey im having trouble understanding 40 divided by 8? could you help me out haha
meriva

Answer:

40/8

Step-by-step explanation:

40 divided by 8 is 5.

The way you can check this is by multiplying 8*5

Basically what number times 8 will equal 40

6 0
2 years ago
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