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3 years ago

In a class,three fifths of the children are girls.what percentage are boys.

Mathematics

2 answers:

sertanlavr [38]3 years ago

5 0

Answer:

4/5

Step-by-step explanation:

strojnjashka [21]3 years ago

5 0

Answer:

40%

Step-by-step explanation:

If 3/5 = .06 are girls

that means

2/5 = .04 are boys

now

5/5 = 1 are the total children

Finally find the percentage

(.06)(100) = 60% girls

(.04)(100) = 40% boys

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What is x-2y=-1 and 2y+y=4 using elimination step by step

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Answer: is it supposed to be 2y+y=4?

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2 years ago

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A rancher needs to enclose two adjacent rectangular corrals, one for cattle and one for sheep. If the river forms one side of t

Serga [27]

Basically, what this asks you is to maximize the are A=ab where a and b are the sides of the recatangular area (b is the long side opposite to the river, a is the short side that also is the common fence of both corrals). Your maximization is constrained by the length of the fence, so you have to maximize subject to 3a+b=450 (drawing a sketch helps - again, b is the longer side opposite to the river, a are the three smaller parts restricting the corrals)
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so the maximization max(ab) becomes
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Hope that helps!

5 0

2 years ago

Identify, whether the given polynomial is a monomial, binomial, or a trinomial.

Finger [1]

That's a monomial; it has one variable, one coefficient, and one degree.

8 0

2 years ago

Someone please help me

aliina [53]

Answer:

8. Louis

9. Rose; Raymond

Step-by-step explanation:

8. An exponent represents the number of times the base appears as a factor in the product.

We use a coefficient to signify repeated addition: 3x means x+x+x.

We use an exponent to signify repeated multiplication. x³ means x·x·x.

So, the expression ...

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You can see that the factor 4 appears 7 times in the product, so would be represented in exponential form as ...

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Louis has correctly observed this fact. In general, we see that multiplying powers of the same base causes those powers to be added.

<u>Part A</u>. Rose is correct for the same reason as in problem 8.

5^5 · 5^2 = 5^(5+2) = 5^7

<u>Part B</u>. Raymond is correct. We know that division cancels similar terms from the numerator, so ...

$\dfrac{7^9}{7^5}=\dfrac{7\cdot7\cdot7\cdot7\cdot7\cdot7\cdot7\cdot7\cdot7}{7\cdot7\cdot7\cdot7\cdot7}=7\cdot7\cdot7\cdot7=7^{9-5}=7^4$

The rules of exponents we're using here are ...

(a^b)(a^c) = a^(b+c)

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4 0

3 years ago

A cone has a volume of 33 in.³ if a cylinder has the same height and the same radius as the cone what is the volume of the cylin

Blizzard [7]

Answer:

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2 years ago