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3 years ago

8

Four runners formed a relay team at Jan’s high school. The team completed the relay in 3.86 minutes. Each runner ran exactly the

Same time. What was each runners time?

1 answer:

xeze [42]3 years ago

6 0

Answer: All four runners ran .96 seconds

Step-by-step explanation: The total time of the four runners, divided by the amount of runners.

3.86/4= .965

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Marsha uses 8.5 pints of white paint and blue paint to paint her bedroom walls. 2/5

Serjik [45]

Answer:

5.1 pints

Step-by-step explanation:

Theres 2 ways

First way:

We can do 2/5 of 8.5 which is 3.4. Then, we can subtract 3.4 from 8.5 and get 5.1 pints.

Second way:

We can simply do 3/5 of 8.5 because the remaining 3/5 of the paint is blue. 3/5 of 8.5 is 5.1 pints

Hope this helped! I would appreciate a Brainliest if this helped you!

6 0

1 year ago

The endpoints of the longest chord on a circle are (4, 5.5) and (4, 10.5).

In-s [12.5K]

The longest chord on the circle is the diameter, and the center of the circle is the midpoint of the diameter.

Use the midpoint formula to find the center
((x1 +x2)/2 , (y1+y2)/2).. Just substitute them for the solution

the x-coordinates are the same, so you can just subtract the y-coordinates to find the radius.
10.5 - 8 = 2.5

The equation of the circle is (x - h)² + (y - k)² = r² where r is the radius and (h, k) is the center.

(x - 4)² + (y - 8)² = 6.25

5 0

2 years ago

Read 2 more answers

4. Henry recibe un lápiz nuevo que mide 19 centímetros de largo. Afila el lápiz varias veces. Si el lápiz mide ahora 9 centímetr

stepladder [879]

Answer:

Step-by-step explanation:

Aqui hay que sustraer

entonces empesastes in 19 y ahora tiene 9

19-9 es 10 cm

*No soy tan bien en escribir en español!

7 0

3 years ago

Sandra has 46 fewer coins than martha. Sandra has 57 coins. A. How many coins does Martha have? B. How many coins do Sandra and

Alekssandra [29.7K]

Martha has 103 and together Sandra and Martha have 170 coins.

3 0

3 years ago

Read 2 more answers

Complex numbers & DeMoivre's theory<br> If z=-1-√3 i and z^6=a+bi, a=_____ and b=_____

Mice21 [21]

Convert $z$ to exponential/polar/trigonometric form:

$r=|z|=\sqrt{(-1)^2+(-\sqrt 3)^2}=2$

$\tan\theta=\dfrac{-\sqrt3}{-1}\implies\theta=\dfrac{4\pi}3$

$\implies z=-1-\sqrt3\,i=2e^{4\pi/3\,i}=2\left(\cos\dfrac{4\pi}3+i\sin\dfrac{4\pi}3\right)$

By DeMoivre's theorem,

$z^6=\left(2e^{4\pi/3\,i}\right)^6=2^6e^{24\pi/3\,i}=64e^{8\pi\,i}$

$z^6=64\left(\cos8\pi+i\sin8\pi)=64$

so that $a=64$ and $b=0$ .

8 0

3 years ago