Explanation

speed×time=distance

6×50/60=distance

5km=distance

time = 5/10

time=1/2=30minutes

Explanation

A whole number is simply any positive number that does not include a fractional or decimal part.

This means that, for example, the numbers 0, 1, 2, 3, 4, 5, 6, and 7 are all whole numbers.

Numbers such as -3, 2.7, or 3 ½ are not whole numbers.

Explanation

9/11 + 5/7 = 3/2

Explanation

The prime numbers between 60 and 80 are:

61, 67, 71, 73, and 79

Let's add them up:

61 + 67 = 128

128 + 71 = 199

199 + 73 = 272

272 + 79 = 351

So, the correct answer is: 351

Explanation

The set includes positive integers greater than 2 and less than or equal to 6:

The integers that fit this condition are 3, 4, 5, and 6.

Explanation

An angle is a figure formed by two rays, called the sides of the angle,

Two lines that make an angle are called rays

In plane geometry, an angle is a figure formed by two rays,

ND2-03-2023

Explanation

Explanation

 equivalent ratios for 3: 7 is  9: 21 

Explanation

To divide a number by 100, you can simply move the decimal point two places to the left:

0.26 ÷ 100 = 0.0026

Explanation

A number that is divisible by both 4 and 9 must be a multiple of their least common multiple (LCM), which is 36.

5256 is the only number that is a multiple of 36 (5256 = 36 × 146).