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Shtirlitz [24]
4 years ago
15

Answer 3 questions for 30 points

Mathematics
1 answer:
Anon25 [30]4 years ago
5 0

Answer: 5A 6C 7D

Step-by-step explanation:

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2 1⁄7 × 3 3⁄4 × 5 1⁄3 = <br> plz help me :,(
chubhunter [2.5K]

Answer:

42 6/7

Step-by-step explanation:

For me what i usually do is i convert the mixed number into a fraction, which for example:

Example and Explanation: Step 1

so since the number 7 is the denominator and the 2 is the mixed number, we can multiply these numbers, 2 x 7 = 14, then we add our numerator which in this case, is one, 14 + 1 = 15, and since the denominator stays the same, our fraction now is 15/7. We do the same for the others:

3 3/4:

3 x 4 = 12 + 3 = 15 = 15/4

5 1/3:

5 x 3 = 15 + 1 = 16 = 16/3

Now that they are all fractions we can finally do the multiplication

Multiplying Fractions: Step 2

Multiplying fractions does not require that the fractions have the same denominator. Instead, the numerators are multiplied with each other and the denominators are multiplied with each other. However, the resulting fraction may not be in lowest terms so it may need to be reduced. So since this is a three step multiplication problem, we will multiply two fractions first.

In this case I chose 15/7 x 15/4. so we just multiply from there, 15 x 15 = 225, and  7 x 4 = 28. So our fraction is 225/28, now we will multiply the other fraction: 225/28 x 16/3 which comes out to 3,600/84. Wow, thats a big number, now its time to..

Reduce: Step 3

This fraction is far too big to be a proper answer, so we will reduce, also known as simplifying.  

Find the Greatest Common Factor (GCF) of 3600 and 84, if it exists, and reduce our fraction by dividing both numerator and denominator by it. GCF = 12,

=3600÷1284÷12=3007

Converting to a mixed number using long division with remainders for 300 ÷ 7.

300÷7=42r6

Therefore:

300/7 = 42 6/7

I am so sorry if i am wrong

3 0
3 years ago
An irregularly shaped rock was lowered into a graduated cylinder holding a volume of water equal to 50 ml. The height of the wat
enyata [817]

5 grams per cubic centimeter

3 0
2 years ago
The model is 15 inches tall.
hjlf

Answer:

If one inch is 6.2 meters, then 15 meters is 15 times 6.2. The equation is 15 x 6.2

6 0
3 years ago
Read 2 more answers
Class A has 9 pupils and class B has 24 pupils.
hodyreva [135]

Answer:

mean ≈ 25.45

Step-by-step explanation:

mean is calculated as

mean = \frac{sum}{count}

We require the sum for both classes

class A

mean = \frac{sum}{9} = 40 ( multiply both sides by 9 )

sum = 9 × 40 = 360

class B

mean = \frac{sum}{24} = 20 ( multiply both sides by 24

sum = 24 × 20 = 480

Total sum for both classes = 360 + 480 = 840 , then mean for both classes is

mean = \frac{840}{33} ≈ 25.45 ( to 2 dec. places )

6 0
3 years ago
Find the length of the radius of a sphere with a volume of 904.78 m^3.
KatRina [158]
Volume = (4/3) * PI() * r^3

radius^3 = Volume / (4/3) * PI()

radius^3 = 904.78 /  <span> <span> <span> 4.18879</span></span></span>

radius^3 = <span> <span> <span> 216.000

radius = 6
</span></span></span>




8 0
3 years ago
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