1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aleksandr82 [10.1K]
3 years ago
6

Two cars start from the same point and move in a straight line, one east at a speed of 60 km per hour and the other west at a sp

eed of 80 km per hour. After what time will they live at a distance of 770 km?
Mathematics
1 answer:
Flauer [41]3 years ago
4 0

Answer:

5.5 hours

Step-by-step explanation:

Given that :

Speed of A = 60 kmphr

Speed of B = 80 kmphr

After what time will distance = 770 km

Speed * Time = Distance

Let time = x

Distance A + Distance B = 770

(60 * x) + (80 * x) = 770

60x + 80x = 770

140x = 770

x = 770 / 140

x = 5.5 hours

You might be interested in
Two supplementary angles are in the ratio 2:7. Find the measure of the Acute angle.
Black_prince [1.1K]

Answer:

y=42.3333333333 (repeating)

Step-by-step explanation:

You need to find the corresponding side. You can see D H is corresponding to E C. So here is what you have to do, find x to (8x - 43) and (2x + 13).

2x + 13 + 8x - 43= 90

10x -30 = 90

     +30  +30

10x = 120

/10     /10 = 12

to check if this is right take x which is 12 and plug it in.

8 x 12= 96 then 96 - 43= 53

2 x 21= 24 then 24 + 13= 37

Next you take 53 and 37 and add it together

53 + 37= 90

about that corresponding side, now you know D H and E C both equal 53

Now you can solve your equation.

53 + 2y + y= 180

53 + 3y = 180

-53           -53

         3y = 127

         /3     /3    

y = 42.333333 (repeating)

to check if this is right take y which is 42.3333333 (repeating) and plug it in.

2y means to multiply y two times so...

42.3333333 (repeating)+ 42.33333333 (repeating)= 84.6666666 (repeating)

y = 42.333333333 (repeating)

E C = 53

add all the numbers together

42.333333 (repeating) + 84.66666666 (repating)+ 53= 180

Therefore y equals 42.33333333 (repeating)

6 0
4 years ago
Theo is painting the outside of a cylinder for a craft project. The cylinder has a radius of 2 inches and height of 8 inches. If
-Dominant- [34]

The answer is C because the radius is half of the cylinder which is 2 so the Diameter will be 4 meaning the whole cylinder and 8 times 4 is 32.

I would really appreciate if I got brainliest :)

7 0
3 years ago
Which of the following is the correct ratio for converting kilograms to grams
Brrunno [24]

Answer:

1000 Grams : 1 Kilogram or 1 Kilogram : 1000 Grams

Step-by-step explanation:

In the metric system the value of a kilogram is solved like:

Kg = \frac{g}{1000}

When converting from grams to kilograms, we solve it like:

g = \frac{kg}{0.0010000}

Let's take for example:

2 KG is how many grams?

We use the grams to kilograms formula like so:

g = \frac{2}{0.0010000}

Then we end up with:

g = 2000

6 0
3 years ago
Answer choices are<br> a. 90<br> b. 40<br> c. 10<br> d. 50<br><br> please help
Andrei [34K]
Answer: d. 50

Steps:

1. Find value of x.

5x + 4x = 90

9x = 90

x = 10


2. Use x value to find ∠EDH.

∠EDH = 5x

∠EDH = 5(10)

∠EDH = 50°
7 0
3 years ago
Read 2 more answers
Print Version
san4es73 [151]

Answer:

$9450

Step-by-step explanation:

We will use compound interest formula:

F=P(1+r)^t

Where

F is future amount [what we want to figure out]

P is present amount [9000]

r is rate of interest [since we want for 6 months, the annual interest divided by 2 is r. So r = 10/2 = 5% or 0.05]

t is the time [ the time period is for 6 months so t = 1 since we already converted the interest rate to 6 month chunk]

Putting in formula, we get:

F=P(1+r)^t\\F=9000(1+0.05)^1\\F=9000(1.05)\\F=9450

6 0
4 years ago
Other questions:
  • Find the point, M, that divides segment AB into a ratio of 2:3 if A is at (0,15) and B is at (20,0)
    10·1 answer
  • B(n)=-8-2(n-1) find the 9th term in the sequence
    12·2 answers
  • Solve the equation 4w=130.4
    7·2 answers
  • What is the measure of the missing angle?
    14·1 answer
  • How do you find this? Question 4.
    8·2 answers
  • If there are 48 boys and 36 girls in a room, fill out all of the possible ratios of boys to
    6·1 answer
  • Is a natural number an interger? Always, sometimes, or never?
    8·2 answers
  • I need help qucikly whats the answer??
    8·2 answers
  • Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!
    10·2 answers
  • The passage most strongly suggests that beekeepers’
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!