Animaljamdesires2121 Animaljamdesires2121

02-04-2020
Mathematics

contestada

A store has sold 90 notebooks, which is 20% of all the
notebooks they had. How many notebooks did the store
have at first?

A) 450
B) 23
C) 108
D) 500

Respuesta :

lycheeboba lycheeboba

02-04-2020

Answer: 450
Explanation: 20%=20/100=1/5
Multiply 90 by the reciprocal of 1/5 which is 5
90 x 5 =450

Answer Link

Otras preguntas

Name the following formulas/symbols. a) NAD b) NADP c) NADPH

Which of the expressions are equivalent to the one below? Check all that apply. (5.1)-7 A. (15)-7 B. 5. (1+7) C. (5+1)-7 D. 7+ (15) apex. pic below.

Use the Euclidean algorithm to compute gcd(520038035,622186145) = gcd(991966975,408146589) = A. Not enough information B. Mathematical proof C. Number theory p

Consider the plot of f(x) = 10ˣ. Write the equation of line l.a) y = 10xb) y = 10ˣ+¹c) y = log(base 10)(x)d) y = log(base 10)(10x)

Prove that (cos(3A) - sin(3A))/(1-2sin(2A)) ≡ cos(A) + sin(A) Topic : Trigonometry # Proving Trigonometric Identities # Double Angle Identities # Addition Iden

Which document, delivered to the policy owner, includes information about premium amounts, cash values surrender values, and death benefits for specific policy

Solve the system. x-y+5z=3 2x+3y-z=2 -4x-y-9z=-8

240 plates serve , 40 were option 3. What percentage was option 3?

If you select a marble without looking, how likely is it that you will pick a black one?

12 cookies for 3 people which is the model