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Mekhanik [1.2K]

3 years ago

5

Can someone help me solve these three problems please??

1 answer:

Tasya [4]3 years ago

4 0

I'll solve 21, and you then should be able to solve the rest on your own!

Since ADC is 135, that means that that whole angle is 135 degrees. In addition, since angles ADB and BDC add up to ADC, we get ADB+BDC=ADC=135=11x+9+7x=18x+9. Subtracting 9 from both sides, we get 126=18x. Dividing both sides by 18, we get x=7. Plugging that into 11x+9=BDC, we get 11*7+9=77+9=86

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Question 6 (1 point)

charle [14.2K]

well, the table has 5 points in it, let's pick any two hmmm say let's use hmmm (2 , 7) and (6 , 17)

$(\stackrel{x_1}{2}~,~\stackrel{y_1}{7})\qquad (\stackrel{x_2}{6}~,~\stackrel{y_2}{17}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{17}-\stackrel{y1}{7}}}{\underset{run} {\underset{x_2}{6}-\underset{x_1}{2}}}\implies \cfrac{10}{4}\implies \cfrac{5}{2}$

when x = 0, from the table, y = 2, so there's the y-intercept.

7 0

2 years ago

Okay so I NEED help tonight. Please someone I really have to finish this tonight.

nlexa [21]

What do you need to finish

6 0

3 years ago

SOMEONE HELP PLEASE!!

musickatia [10]

Answer:

15

Step-by-step explanation:

multiply -75*3=225

sqrt that to get 15!

7 0

2 years ago

Goku and vegeta are performing a slow fist bump.With their fist 300mm apart goku moves his 30mm per second towards vegeta who mo

storchak [24]

There fists meet after 3 seconds

30 x 3=90
70 x 3=210
210+90=300

Goku at 90 mm
Vegeta at 210 mm

3 0

2 years ago

Read 2 more answers

The function y=-x^2+65x+256 models the number y of subscribers to a website, where x is the number of days since the website lau

Wittaler [7]

Answer:

$y = 30x+290$

Step-by-step explanation:

Given

$y=-x^2+65x+256$

Required

The linear function of a competitor's website

On day 1, both websites have the same subscribers.

This implies that:

$y=-x^2+65x+256$

Substitute: $x =1$

$y=-(1)^2+65*1+256$

$y=-1+65+256$

$y=320$

This implies:

$(x_1,y_1) = (1,320)$

On day 34, both websites have the same subscribers.

This implies that:

$y=-x^2+65x+256$

Substitute: $x =34$

$y=-(34)^2+65*34+256$

$y=-1156+2210+256$

$y=1310$

This implies:

$(x_2,y_2) = (34,1310)$

To calculate the linear function of the competitor, we have:

$(x_1,y_1) = (1,320)$

$(x_2,y_2) = (34,1310)$

Calculate slope (m)

$m = \frac{y_2 - y_1}{x_2 -x_1}$

$m = \frac{1310 - 320}{34-1}$

$m = \frac{990}{33}$

$m = 30$

The equation is then calculated as:

$y = m(x - x_1) + y_1$

This gives:

$y = 30 * (x - 1) + 320$

Open bracket

$y = 30x - 30 + 320$

<em></em> $y = 30x+290$ <em> --- This represents the linear function of the competitor's website</em>

5 0

2 years ago