Help with a math problem? Help with a few math problems

It takes 10 hours for a bus to go from city A to city B, so it takes 1 10 miles to complete in an hour, and it takes 15 hours for a truck to go from city B to city A, so it can be completed 1 15 miles per hour, and it can be calculated that two cars will meet at a time of 1 (1 10 + 1 15), that is, = 6 hours to meet, and when the two cars meet, the bus is 192 kilometers away from B, so this 192 kilometers is the proportion of the distance run by the truck at the time of the encounter, that is, 6 15, in other words, the truck runs 6 The distance of 15 is 192 km, so the total distance is 192 (6 15) = 480 km!

The equation is: 1 (1 10 + 1 15) = 6 (hours) 192 (6 15) = 480 (kilometers).

Answer; The distance between the two places is 480 kilometers.

Shen ** points!! Hard points.

Passenger cars travel 1 to 10 per hour for the whole journey

Trucks travel 1 to 15 per hour for the entire journey

They set off from both ends together, and when they got together, the two cars completed the whole journey.

And they went all the way at a speed of (1 10 + 1 15) 1 6.

From this, it can be concluded that they walked for 6 hours.

At 6 hours, the bus was still 192 kilometers away from place B, and the truck traveled 192 kilometers.

Then the speed of the truck is: 192 6 32 (kmh) because the whole journey of the truck takes 15 hours, and the speed is 32 km/h, so the whole journey is 32 15 480 (km).

You guys are amazing.

If I write my answers, I'll think I'm copying yours.

All right. I can't do it here.

A more modest compliment. You're all amazing!

1 divided by (1/10 + 1/15) = 6 hours.

192 divided by (10-6) = 48 km.

48 x 10 = 480 km.

I'll do it first, I'll divide it!

That's it. cos[(6k+1)π/3+2x]=cos[2kπ+π/3+2x]=cos[π/3+2x]

cos[(6k-1)π/3-2x]=cos[2kπ-π/3-2x]=cos[π/3+2x]

f(x)＝2cos(2kπ)*cos(π/3＋2x)＋2√3sin(π/3+2x）

2cos(π/3＋2x)＋2√3sin(π/3+2x）4*sin(π/2＋2x)

4*cos(2x)

Range: -4 f(x)4, minimum positive period: t

Use the brackets accurately, otherwise you won't be able to understand the question.

007 Flower Remnant Dream, Hello:

Vector od = vector oc + vector cd = c + vector ba = c + vector bo + vector oa = c-b + a

Since AD is parallel to BC, the vector AD is equal to BC, i.e., c-b=bc=ad, then od=ad+oa=c-b+a!

a=od+da

c=od+dc

b=od+db

db=da+dc

a+b+c=3od+2db=od+2b

od=a+c-b

The picture is shown in the answer album of my space album, I hope it can help you.

Xiaohong's house saves 12 degrees of electricity in my month compared with April, saving 5%, how many degrees of electricity does Xiaohong's family use in May?

A cosmetic product, priced at 186 yuan, 20% cheaper than the original price, how much cheaper?

When car A and car B travel 60% of the whole journey, and car B travels 75% of the whole journey, and the two cars are 70 kilometers apart, how many kilometers are the two kilometers apart?

12/[186/(

30, sell 60 on the first day, sell 60 * 60 on the second day, a total of 200 discs, sell a total of (60+72) 200 = 33 5070 (

Question 1:

Solution: If the electricity consumption in May is x, then the electricity consumption in April is (x-12) degree (x-12) = (1-5%) x

x-12=95%x

x-95%x=12

5%x=12

x=240 Question 2:

Solution: Set the original price to X yuan.

I don't have time, let the others solve the rest of the rest! Excuse me.