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3 years ago

Solve each system by substitution

Mathematics

1 answer:

Studentka2010 [4]3 years ago

7 0

Answer:

look, equation ii and vi are contradicting each other....

Step-by-step explanation:

after eliminating those equation you can find the value of x and y.

y=-6

x=3

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Tom throws a ball into the air. The ball travels on a parabolic path represented by the equation , where represents the height o

tigry1 [53]

Answer:

2.5 second

Step-by-step explanation:

The equation is missing in the question.

The equation is, $h=-8t^2+40t$ , where 'h' is the height and 't' is time measured in second.

Now we know to reach its maximum height, h in t seconds, the derivative of h with respect to time t is given by :

$\frac{dh}{dt} =0$

Now the differentiating the equation with respect to time t, we get

$\frac{dh}{dt}=\frac{d}{dt}(-8t^2+40t)$

$\frac{dh}{dt}=-16t+40$

For maximum height, $\frac{dh}{dt} =0$

So, $-16t+40=0$

$\Rightarrow 16t=40$

$\Rightarrow t=\frac{40}{16}$

$\Rightarrrow t = 2.5$

Therefore, the ball takes 2.5 seconds time to reach the maximum height.

7 0

3 years ago

I want only question number 3

zmey [24]

Answer:

Computers R Us has a better price because it cost less at the same production rate.

Step-by-step explanation: to graph y=23.5x you just plug in numbers. If x = 1, 23.5 (1), which equals y. Now you can keep doing this to get up to 4. You may use a calculator if youd like.

3 0

3 years ago

Find the correct linear equation: y is the quotient of thrice a number and ten.

Anarel [89]

Answer:

y = (3x)/10

Step-by-step explanation:

quotient = divide

7 0

3 years ago

(URGENT) Will give 25 points

Studentka2010 [4]

Volume = 2 x 6 x 1 + 1 x 2 x 2
Volume = 16 cubic feet

Shipping Cost = 20 + 1 x 6 = $26

5 0

3 years ago

Read 2 more answers

50 men working 10 hours daily can complete a job in

Sliva [168]

<h2>Given :-</h2>

50 men do 10 hours work daily complete work in 20 days

80 men do job in 50% time

Days required

<h2>Solution :-</h2>

1 man may do job in (50 × 20) days =
1 man may do job in 1000 days

Now,

80 man = 1000/80 = 12.5

Now,

When hours reduced 50% then we will multiply days by 2
Total days = 12.5 × 2 = 25 days.

<h2>Hence</h2>

Option C is correct

$\begin{gathered} \\ \end{gathered}$

8 0

3 years ago