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prisoha [69]
3 years ago
9

At the Grassy Meadows Mennonite School, the total number of students in grade 7-9 is the lowest commom multiple of the numbers o

f students in grades 8 and 9 . Eight grade has 5 students, ninth grade has 3 students. how many students are in seventh grade?
please help
Mathematics
1 answer:
kobusy [5.1K]3 years ago
4 0

Answer:

Seven  

Step-by-step explanation:

Let G7, G8, and G9 be the numbers of students in the respective grades.

Then, G7 + G8 + G9 = LCM of G8 and G9

<em>Data: </em>

G8 = 5

G9 = 3

<em>Calculations: </em>

<em>Multiples of 5</em>: 1 2          10 15

<em>Multiples of 3</em>: 1   3 6 9       15

The <em>LCM</em> of 5 and 3 is 15.

G7 + 5 + 3 = 15     Combine like terms

     G7 + 8 = 15     Subtract 8 from each side

           G7 = 7

There are seven students in Grade 7.


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4) Arnold ate breakfast at a restaurant. His total came to $76.75. There is an 8% sales tax and 15% tip. What is Arnold's total
lisov135 [29]

Answer:

The total cost is $95.32.

Step-by-step explanation:

Given:

Total came to $76.75. There is an 8% sales tax and 15% tip.

Now, to find the total cost.

<em>8% sales tax is there so we calculate the amount after adding sales tax:</em>

$76.75 + 8% of $76.75

76.75+\frac{8}{100}\times 76.75

76.75+0.08\times 76.75

76.75+6.14

82.89

The cost after sales tax is $82.89.

Now, <em>the cost after 15% tip:</em>

$82.89 + 15% of $82.89

82.89+\frac{15}{100}\times 82.89

82.89+0.15\times 82.89

82.89+12.43

95.32

The cost after the tip is $95.32.

Therefore, the total cost is $95.32.

8 0
3 years ago
Evaluate.<br> 3^2 + 12 ÷ (6 - 3) x 8
valentinak56 [21]

Answer:

38 is your answer :)

Step-by-step explanation:

So what you want to do is P.E.M.D.A.S (parenthesis, exponets, multiplication/division, addition/subtraction) * whatever comes first always do it in order*

3^2+12/ (6-3) x 8

6-3 = 3

3^2+12/(3)*8

3^2+4*8

6+4*8 =32 and 32+6 = 38

7 0
2 years ago
Read 2 more answers
Write 350 as a product of primes
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Answer:

350 = 2 \times 5 \times 5 \times 7

Step-by-step explanation:

350 = 2 \times 5 \times 5 \times 7

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2 years ago
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Answer: 0.6934%

Step-by-step explanation:

Probability is the branch of mathematics that is concerned with the numerical descriptions of how likely an event will occur or how likely a proposition is true

If 37% of high school students said that the exercise regularly, the

probability that 5 students who are randomly selected will say thay they exercise regularly will be:

= (37/100)^5=0.006934

= 0.6934%

6 0
3 years ago
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