What is the answer ?

Mathematics

1 answer:

AleksandrR [38]3 years ago

5 0

In 2 hours, the train will cover 120 miles, in 4 hours, the train will cover 240 miles. The train covered 120 more miles in 4 hours than it did in 2 hours.

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The length of an alligator in a zoo is 14 5/12 feet. The Everglades national park lists the longest alligator ever recorded in F

evablogger [386]

Answer:

Step-by-step explanation:

Its 3 because 17 5/12 - 14 5/12= 3 17-14=3 and the two 5/12 cancel out and make it 3+0. 3+0=3 so the answer is 3

in other words just minus the fractions from each other and the whole numbers from each other so it would be. 17-14 and 5/12-5/12

17-14=3 5/12-5/12=0

4 0

3 years ago

Solve the problem below by writing and solving an equation. Be sure to define your variable. There are a total of 122 countries

valina [46]

Answer:

North America has 23 countries

Europe has 46 countries

Africa ha 53 countries

Step-by-step explanation:

Firstly to answer the question, we define variables. Let the number of countries in Africa be A, the number of countries in europe be E while the number of countries in North America be N.

Firstly, we are told there are a total number of 122 countries. Mathematically this means the addition of all the countries will give 122

Hence;

N + A + E = 122. •••••••(i)

Secondly we are made to know that Europe has twice as many countries as North America;

Mathematically l, this means

E = 2N. •••••••••(ii)

Thirdly we know that Africa has 7 more countries than Europe;

This mathematically means that

A = E + 7. •••••••••(iii)

Since E = 2N, A = 2N + 7 ••••••••(iv)

Now what to do to find the answer is to substitute equation ii and iv at the same time into equation i

This will give the following;