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cupoosta [38]
2 years ago
6

. Evaluate each of the following without using a calculator. Show all steps clearly. - 5^2​

Mathematics
1 answer:
Verizon [17]2 years ago
7 0

Answer:

25

Step-by-step explanation:

-5^2 expanded is  -5 x -5

- two negatives equal a positive

-visual representation of 5 x 5

O O O O O

O O O O O

O O O O O

O O O O O

O O O O O

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Kaya devoted 2/5 of her study time to mathematics, 3/20 of her time to social studies, 1/3 of her time to chemistry and the rema
andrezito [222]

Answer:

  54 minutes

Step-by-step explanation:

The sum of fractions is ...

  2/5 + 3/20 + 1/3 = 11/20 +1/3 = (3·11 + 20·1)/(20·3) = 53/60

Then the 42 minutes devoted to English represents 1 - 53/60 = 7/60 of her study time.

Kaya's social studies time is 3/20 = 9/60 of her total, so the ratio of SS to Eng is ...

  SS : Eng = (9/60) : (7/60) = 9 : 7

When we multiply the numbers in this ratio by 6, we find ...

  SS : Eng = 54 : 42

Kaya spent 54 minutes studying social studies.

5 0
3 years ago
Write an algebrale expression for the phrase "elghe more than three times a<br> number
gavmur [86]

x 3

Step-by-step explanation:

5 0
3 years ago
Whar is the LCM of 1/6 and 3/8​
aalyn [17]
<h3>Answer: 24</h3>

==========================================

There are 3 methods to find the lowest common multiple (LCM)

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

Method 1

List out the multiples of 6 and 8

multiples of 6 = {6, 12, 18, 24, 30, 36, 42, 48, ...}

multiples of 8 = {8, 16, 24, 32, 40, 48, ...}

We see that 24 is the smallest number in both sets at the same time. So this is the LCM.

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

Method 2

Write the prime factorization of 6 and 8

prime factorization of 6 = 2*3

prime factorization of 8 = 2*2*2

The unique prime factors here are 2 and 3. We have 2 show up at most three times meaning that 2*2*2 = 8 is a factor of the LCM. The number 3 is also a factor meaning that 8*3 = 24 is the LCM.

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

Method 3

Multiply the denominators 6 and 8 to get 6*8 = 48

48 is a common multiple, but its not the smallest

we can divide 48 over the GCF 2 to get 48/2 = 24, which is the actual LCM.

So when you have 2 different denominators, you can multiply their values and then divide by the GCF to get the LCM.

3 0
3 years ago
Read 2 more answers
Round each number to the nearest 10 and 100
andriy [413]
&0 bc it makes the most sence
5 0
3 years ago
What is the value of x in 40,000 mg = 10x g? Please answer quick!
Paul [167]
1g = 1000mg

40,000mg = 40g

10xg=40g

X=4

Hope this helps.
5 0
3 years ago
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