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2 years ago

(Pls help) I need help finding x!

Mathematics

1 answer:

Ray Of Light [21]2 years ago

8 0

Answer:

x ≈ 46°

Step-by-step explanation:

Since the triangle is right use the sine ratio to solve for x

sinx = $\frac{opposite}{hypotenuse}$ = $\frac{10}{14}$ , hence

x = $sin^{-1}$ ( $\frac{10}{14}$ ) ≈ 46°

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x axis is x = 4.00 - 7.00t2, with x in meters and t in seconds. (a) At what time and (b) where does the particle (momentarily) s

andrezito [222]

Answer:

(a) 0 s

(b) 4.00 m

(d) +0.76 s

Step-by-step explanation:

$x=4.00-7.00t^2$

It stops momentarily when the velocity, $v$ is 0. $v$ is the derivate of $x$ .

(a) $v=\frac{dx}{dt}=-14.00t$

Setting this to 0,

$-14.00t=0$

$t=0$

(b) Substitute this value for $t$ in $x$ to get its position.

$x=4.00-7.00\times0^2=4.00$ m

It passes the origin when $x=0$

$4.00-7.00t^2=0$

$7.00t^2=4$

$t^2=\frac{4}{7}$

$t=\pm\sqrt{\frac{4}{7}}$

(d) The positive time is $t=+\sqrt{\frac{4}{7}} =+0.76 s$

8 0

3 years ago

Rani uses a container that can hold 2 liters of water to fill a

Delicious77 [7]

Answer:

4 times

Step-by-step explanation:

If the smaller container only holds 2 liters, you would have to divide 8 by 2 which is 4.

7 0

2 years ago

Read 2 more answers

Please help <br> Can someone answer and tell me how to do this <br> (Will mark brainliest)

Gre4nikov [31]

Answer:

57 degrees

Step-by-step explanation:

Total measurement of any triangle is 180 degrees.

/_V=180-53.8-69.2=57 degrees

8 0

3 years ago

It takes Lucas 3 hours to cycle from his home to his friends village but if travels 5 mph slower, it will take him 1.5 hours lon

sergey [27]

Answer:

$Distance=45\ miles$

Step-by-step explanation:

$Let\ distance\ between\ Lucas\ home\ to\ friends\ village=d\\\\Let\ speed\ of\ Lucas's\ cycle=v\\\\Time\ taken=3\ hours\\\\distance=velocity\times time\\\\d=v\times 3\\\\d=3v$

$Now\ if\ speed\ is\ 5mph\ slower\ \Rightarrow\ speed=v-5\\\\Time\ taken=3+1.5=4.5\\\\distance=velocity\times time\\\\d=(v-5)\times 4.5=4.5v-22.5\\\\d=4.5v-22.5$

$d=3v...................eq(1)\\\\d=4.5v-22.5.....eq(2)\\\\1.5\times eq(1)-eq(2)\\\\1.5d-d=1.4\times 3v-4.5v+22.5\\\\0.5d=4.5v-4.5v+22.5\\\\0.5d=22.5\\\\d=\frac{22.5}{0.5}\\\\d=45\ miles$

8 0

3 years ago

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Figure ABCD is similar to figure EFGH. What is the sequence of transformations that maps ABCD to EFGH?

sukhopar [10]

Answer:

The orientation of the figure has been changed by 90°, but the points are not all rotated around the same center. Translation is involved.

Step-by-step explanation:

Translation before rotation:

.. translate down 5 units

.. rotate counterclockwise 90° about the origin

Translation after rotation:

.. rotate counterclockwise 90° about the origin

.. translate right 5 units

This can also be accomplished by a double reflection.

.. reflect across the line y=x

.. reflect across the line x=2.5

Or,

.. reflect across the line y=2.5

.. reflect across the line y=x

8 0

3 years ago