camila1525sanchez camila1525sanchez
  • 06-11-2020
  • Mathematics
contestada

A student answers 70% of the questions on a math exam correctly. If he answers 21 questions correctly , how many questions are on the exam ?

Respuesta :

asdfghdrty2356 asdfghdrty2356
  • 07-11-2020

Answer:

There are 30 questions

Step-by-step explanation:

70%=21

70%÷7=10%

21÷7=3

10%=3

10%×10=100%

3×10=30

Hope this helped :)

Answer Link

Otras preguntas

I need help for algebra 2 for simplify form for example (3x-2i)(3x+2i)
Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The
add and simplify  9/16=1/2=?
vesicles that contain a cells digestive enzymes are called ?
who was the first president of the united states of america
log3(2x-5)=2 Answer is 41/2.  Why?
Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The
add and simplify  9/16=1/2=?
(−2x0y3 )(4x2y4 )+(2y5 )(3xy)2
Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The