Explanation

A 7% sales tax means:

x + 0.07x = 22.90  

⇒ 1.07x = 22.90  

⇒ x = 22.90 / 1.07 = 21.40

Explanation

To make a desert = 2.5 pints

To make 3 desserts =?

= 2.5 x 3

= 7.5

Explanation

July is 7th month of English Calendar 

The odd-numbered months are January, March, May, July, September, and November, being the 1st, 3rd, 5th, 7th, 9th, and 11th,

while the others are even months.

So there are 6 odd months and 6 even months.

Explanation

Equilateral Triangle Three equal angles, always 60

all sides are of equal length (equilateral), and all  angles are right angles. 

A triangle that has no equal sides and no equal angles is known as a Scalene Triangle

while 

if two sides of a triangle are of equal length, then it is called. Isosceles triangle

Explanation

Given:  

- Pages read = 24  

- Time = 15 minutes  

Rate = Pages ÷ Time = 24 ÷ 15 = 1.6 pages per minute

Explanation

The square root of -25 is 5i, where i is the imaginary unit (√-1). 

Since the square root of a negative number is not a real number, we use imaginary numbers to express it.  

So, √(-25) = 5i.

Explanation

A cube can be made with equal blocks for length breadth and height.

Let's see, 1*1*1=1 2*2*2=8 3*3*3=27 4*4*4=64.

Oops, larger than 59. So we need only 27 blocks.

That means that we can take away 50-27=23 blocks.

Explanation

The given series is a square of natural number

(1)^2 = 1

(2)^2 = 4

(3)^2 =9

(4)^2 = 16

(5)^2 = 25

(6)^2 = 36

(7)^2 = 42

(8)^2 = 64

Explanation

Explanation

Given: x = 3  

x³ = 3 × 3 × 3 = 27