3 years ago

Solve for x 4(5x-20)=-20

Mathematics

1 answer:

dybincka [34]3 years ago

5 0

20x-80=-20
-80 -80
20x= -100
/20 /20
x=-5

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Some fireworks are fired vertically into the air from the ground at an initial speed of 80 feet per second. The equation for thi

EastWind [94]

Answer:

Vertex (-2.5,-300)

Step-by-step explanation:

We are given with h(t)=-16 t^2 +80 t. We are asked to find the vertex.

X-coordinate of vertex = $\frac{-b}{2a}$

Where 'a' is coefficient of $t^{2}$ term

'b' is coefficient of 't' term.

From given function, a= -16

b=80

So,

x-coordinate of vertex = $\frac{-80}{2(-16)}$

=-2.5

y-coordinate of vertex = $-16(-2.5)^{2} +80(-2.5)$

Simplify it,

=-100 -200

= -300

So, vertex is at (-2.5, -300).

4 0

3 years ago

If you could help I would really appreciate it, but if not that’s fine. Thank you.

zloy xaker [14]

Answer:

2x - 5 if x ≤ 2

f(-1) = -7

Step-by-step explanation:

x ≤ 2 = (-1) ≤ 2

x > 2 = (-1) > 2

2x - 5

2(-1) - 5

-2 - 5

-7

8 0

3 years ago

How to find the point slope form with the slope of 3 and the point of -2/6

Levart [38]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \:y-6 = 3(x + 2)$

____________________________________

$\large \tt Solution \: :$

Equation of line in point - slope form :

$\qquad \tt \rightarrow \:y-y_1 = m(x - x_1)$

$\tt \:m = slope=3$

$\tt y_1 = y \: \: coordinate \: \: of \: \: point = 6$

$\tt \:x_1 = x \: \: coordinate \: \: of \: \: point = - 2$

Here :

$\qquad \tt \rightarrow \:y - 6 = 3(x - ( - 2))$

$\qquad \tt \rightarrow \:y - 6 = 3(x + 2)$

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2 years ago

What is the missing equation N÷6=8

solong [7]

48.

N/6 = 8
48/6 = 8
8 = 8
8 does indeed equal 8

Good luck!

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3 years ago

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Write the ratio three to seven in two other ways

jarptica [38.1K]

These are the 3 ways to write 3:7

3:7
3/7
3 to 7

4 0

3 years ago

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