(3) Find the number of ways for ordering ice cream if the following choices

Mathematics

1 answer:

GarryVolchara [31]3 years ago

6 0

Answer:

add a code to what you want

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An express train and car leave Los Angeles at the same time and head for Merced 280 miles away. The rate of the train is twice t

larisa86 [58]

Now, recall your d = rt, or distance = rate * time

so.. the train and the car, both leave LA, and go to Merced, which is 280miles away.....alrite, the train is going twice as fast as the car is, so, if the car is going "r" fast, then the train is going 2*r or 2r fast

now, the train arrives 4hrs earlier than the car, so, if the car took "t" time to arrive, the train took then t-4

now, both, arrived at Merced, that means, the distance covered by each, is 280miles

thus $\bf \begin{array}{lccclll}
&distance&rate&time\\
&-----&-----&-----\\
train&280&2r&t-4\\
car&280&r&t
\end{array}
\\\\\\
\begin{cases}
280=2r(t-4)\\\\
280=rt\implies \cfrac{280}{r}=\boxed{t}\\
----------\\
280=2r\left( \boxed{\cfrac{280}{r}}-4 \right)
\end{cases}$

solve for "r"

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3 years ago

Find the distance between the points, 6−3 and, 6−6.

borishaifa [10]

Answer:

9 units

Step-by-step explanation:

using distance formula

3 0

3 years ago

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Write the standard form of the equation of a circle with radius 10 and center (9,3)

gladu [14]

Answer:

$(x-9)^{2}+(y-3)^{2} =100$

Step-by-step explanation:

The standard form formula for a circle equation is $(x-h)^{2}+(y-k)^{2} =r^{2}$ , where (h,k) represents the center of the circle, and r represents the radius.

r=10

(h,k)= (9,3)

$(x-h)^{2}+(y-k)^{2} =r^{2}$

$(x-9)^{2}+(y-3)^{2} =10^{2}\\(x-9)^{2}+(y-3)^{2} =100$

8 0

3 years ago

The mean sustained wind velocity, v, can be determined by the equation v = 6.3 StartRoot 1013 minus p EndRoot, where p is the ai

olya-2409 [2.1K]

Answer:

910 millibars

Step-by-step explanation:

According to the Question,

Given That, The mean sustained wind velocity equation $v=6.3*\sqrt{1013-p}$ And The mean sustained wind velocity is 64m/s (v=64) . where, p is the air pressure(in millibars).