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At 8am,Ming Wei started travelling from Town A to Town B.At 8:40am, Ali started travelling from Town B to Town A.Mingwei's speed

Vesnalui [34]

Let's write some equations.

Mingwei's distance from Town A after $x$ hours from 8:00 is $45x$ .

Ali's distance from Town B after $x$ hours is $30x-20$ , since he doesn't start walking for 40 minutes.

When Mingwei's distance is twice Ali's, they've met up (since their distance from Town A is twice their distance from Town B).

So, this gives $45x=60x-40$ , so $15x=40$ , so $x=\frac{40}{15} = \frac{8}{3}$ , so the time is 10:40.

After $\frac83$ hours, Mingwei has traveled $45 * 8 / 3 = 120$ kilometers while Ali has traveled sixty, so the distance between the towns is $180$ kilometers.

7 0

3 years ago

Letters in the word mathematics

liubo4ka [24]

Answer:

Answer is given below .

Step-by-step explanation:

Letters in the word "MATHEMATICS "

M,A,T,H,E,I,C,S.

 

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THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION. 

3 0

3 years ago

Find the area of the trapezoid

lidiya [134]

area = ( top rule + bottom rule ) × height / 2

area = ( 2 + 3 ) × 4 / 2

area = 5 × 4 / 2

area = 20 / 2

area = 10

4 0

2 years ago

Read 2 more answers

Find the measures of the angles in ∆ABC if m∠A : m∠B : m∠C = 2:3:4.

g100num [7]

Answer:

A=40, B=60, C=80

Step-by-step explanation:

180/7 to find what "1" would be in the ratio then multiply 20*2, 20*3, 20*4.

3 0

3 years ago

Lines m and n are cut by transversal l. which angle relationships are correct? check all that apply.

stich3 [128]

Answer:

1,2,5

Step-by-step explanation:

5 0

2 years ago