Use mental math to estimate the unknown number 4210 divided by 6

Mathematics

2 answers:

professor190 [17]3 years ago

8 0

6 times 7 42 plus 4210

RideAnS [48]3 years ago

6 0

6 divides into 42 producing a quotient of 7 and no remainder. All that's left is to divide 6 into 10. That produces 1 with a remainder of 4.

So you could say immediately that 4210 divided by 6 is approx. 71.

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How do you solve the system:<br> y+1=2x<br> 5y+5=10x

Marta_Voda [28]

Answer:

choose "infinitely more solutions"

Step-by-step explanation:

Let's solve this system by substitution method

y+1=2x

- 1 = - 1

y = 2x -1 <-- sbstitute this in the next equation

---------------------------------------------------------------------------------

5y+5 = 10x

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Henry takes a math test that had 20 questions.

dezoksy [38]

The percentage of correct answers is 85% and the percentage of incorrect answers is 15% and this can be determined by using the unitary method.

Given :

Henry takes a math test that had 20 questions.
He answered 17 questions correctly and 3 questions incorrectly.

The following steps can be used in order to determine the percentage of correct and incorrect questions Henry answered:

Step 1 - The unitary method can be used in order to determine the percentage of correct and incorrect questions Henry answered.

Step 2 - The total number of questions in a math test is 20. The total number of correct answers is 17 and the total number of incorrect answers is 3.

Step 3 - If the 20 is the 100% questions then the percentage of 17 correct answers is:

$=\dfrac{17}{20}\times 100$