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vampirchik [111]

3 years ago

10

Help me out please !!

1 answer:

worty [1.4K]3 years ago

7 0

Answer:

I'm thinking it's B

Step-by-step explanation:

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Can someone please help,ty!!

Scorpion4ik [409]

<h3>Answer: (0, -1)</h3>

Look where the graph crosses the vertical y axis. This point is the y intercept.

In this case, the y intercept is located at (0, -1)

You start at the origin (0,0) and move down 1 unit to get to (0, -1)

Side note: The equation of this line is y = 2x-1

6 0

4 years ago

Amir throws a stone off of a bridge into a river. The stone's height (in meters above the water) ttt seconds after Amir throws i

Harrizon [31]

Answer:

1) The vertex form of $h(t) = -5\cdot t^{2}+20\cdot t +160$ is $h -180 = -5\cdot (t-2)^{2}$ , 2) The stone reaches its maximum height 2 seconds after being thrown.

Step-by-step explanation:

1) Given that height of the stone is represented by a second-order polynomial, which depicts a parabola as graph. The best approach to determine the instant when stone reaches its highest is by vertex form, whose form is:

$h-k = C\cdot (t-r)^{2}$

Where:

$r$ , $k$ - Instant and maximum height of the stone, measured in seconds and meters.

$C$ - Vertex constant, which must be negative as there is an absolute maximum, measured in meters per square second.

Let be $h(t) = -5\cdot t^{2}+20\cdot t +160$ , which is transformed into vertex form:

i) $h = -5\cdot t^{2}+20\cdot t +160$ Given

ii) $h = -5\cdot (t^{2}-4\cdot t -32)$ Distributive property/ $(-a)\cdot b = -a\cdot b$

iii) $h = -5\cdot [(t^{2}-4\cdot t +4)+(-36)]$ Existence of additive inverse/Definitions of addition and subtraction

iv) $h = (-5)\cdot (t-2)^{2}+180$ Distributive property/ $(-a)\cdot (-b) = a\cdot b$ /Perfect square binomial

v) $h -180 = -5\cdot (t-2)^{2}$ Compatibility with addition/Existence of additive inverse/Modulative property/Definition of subtraction/Result

The vertex form of $h(t) = -5\cdot t^{2}+20\cdot t +160$ is $h -180 = -5\cdot (t-2)^{2}$ .

2) The time can be extracted from previous results, which indicates that stone reaches its maximum height 2 seconds after being thrown.

4 0

3 years ago

Help me please i'm having alot of trouble

Arte-miy333 [17]

204

71:35=2

2 goes on the top

2x35=70

71-70=1

then carry them down 14

14:35=0

Carry it up it should be 20 up there now

Carry the 0 from the 7140 down to make it 140

140:35=4

Then carry that 4 up and your answer is 204

3 0

3 years ago

(-4+2)•(-5+3)/-3 please help

Mamont248 [21]

Answer:

-4/3

Step-by-step explanation:

(-4 + 2) • (-5 + 3)/-3

=> -2 • (-2)/-3

=> -2 • 2/3

=> -4/3

Therefore, -4/3 is your answer.

Hoped this helped.

4 0

2 years ago

Read 2 more answers

The following table shows the bonus earned by Abel for selling different numbers of toys: Abel's Bonus Number of Toys Sold Bonus

Alenkinab [10]

It would be 36, because the pattern goes from 20 to 25 each time.

3 0

4 years ago

Read 2 more answers