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4 years ago

8

Brian says that when you add or subtract fractions with the same denominator you will add or subtract numerators and keep the sa

me denominator is Brian correct

2 answers:

marusya05 [52]4 years ago

8 0

Yes.................!!!!!

Savatey [412]4 years ago

6 0

He is correct because your denominator also stay the same

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WILL GIVE BRAINLEIST THANK YOU AND FRIEND YOU NEED TO GIVE AWAY POINTS EASY A counterexample is an example showing that a statem

Zigmanuir [339]

4 ÷ 2 = 2
2 ÷ 4 = 1/2
As we can see, the order in which the numbers are divided yielded different results.

8 0

3 years ago

If an arrow is shot upward on Mars with a speed of 62 m/s, its height in meters t seconds later is given by y = 62t − 1.86t². (R

Soloha48 [4]

Answer:

Approximately $58.28\; \rm m \cdot s^{-1}$ .

Step-by-step explanation:

The velocity of an object is the rate at which its position changes. In other words, the velocity of an object is equal to the first derivative of its position, with respect to time.

Note that the arrow here is launched upwards. (Assume that the effect of wind on Mars is negligible.) There would be motion in the horizontal direction. The horizontal position of this arrow will stays the same. On the other hand, the vertical position of this arrow is the same as its height: $y = 62\, t - 1.86\, t^2$ .

Apply the power rule to find the first derivative of this $y$ with respect to time $t$ .

By the power rule:

the first derivative of $t$ (same as
the first derivative of $t^2$ (same as $t$ to the second power) with respect to

Therefore:

$\begin{aligned}\frac{dy}{d t} &= \frac{d}{d t}\left[62 \, t - 1.86\, t^2\right] \\ &= 62\,\left(\frac{d}{d t}\left[t\right]\right) - 1.86\, \left(\frac{d}{d t}\left[t^2\right]\right) \\ &= 62 \times 1 - 1.86\times\left(2\, t) = 62 - 3.72\, t\end{aligned}$ .

In other words, the (vertical) velocity of this arrow at time $t$ would be $(62 - 3.72\, t)$ meters per second.

Evaluate this expression for $t = 1$ to find the (vertical) velocity of this arrow at that moment: $62 - 3.72 \times 1 =58.28$ .

6 0

3 years ago

Read 2 more answers

Use the given data to find the minimum sample size required to estimate the population proportion. margin of error: 0.0080.008

nadezda [96]

Formula for the Minimum Sample size $n=(\frac{z}{E})^2\hat{p}\hat{q}$

The least biased estimate for p and q is 1/2.

$z_{\frac{\alpha }{2}}=z_{{0.01}{2}}=2.58$

Thus

$n=(\frac{2.58}{0.08})^2*0.5*0.5$

$n=260.015$

$n\approx260$

3 0

3 years ago

Can anyone help Me Please

kari74 [83]

Range of values of x is $32$ .

<u>Step-by-step explanation:</u>

With Rule of concurrency of two triangles, we have,

$\frac{Angle1}{Side1} = \frac{Corresponding Angle}{Corresponding Side}$

⇒ $\frac{x+2}{13} = \frac{37}{14}$

⇒ $14(x+2) = 37(13)$

⇒ $14x + 28 = 481$

⇒ $14x = 453$

⇒ $x = \frac{453}{14}$

On simplifications, $x = 32.37$

∴Range of values of x is $32$ .

7 0

3 years ago

What equation, in point-slope form, matches the graphed line shown? Question 3 options: y−5=−23(x+9) y−2=−34(x−6) y+6=45(x+3) y−

ziro4ka [17]

Step-by-step explanation:

the line passes through (6, 2) and (10, -1),

the slope =

(-1-2)/(10-6) = -3/4

the equation :

y-2 = -3/4(x -6)

7 0

3 years ago