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Oduvanchick [21]
3 years ago
11

There are 62 girls in the 7th grade and 58 boys in the 8th grade. Each grade has 120 students. Which statement correctly compare

s the ratios of boys to the total students in each grade? a. The eighth-grade ratio is higher c. The eighth-grade ratio is lesser b. The seventh-grade ratio is greater d. Both ratios are equal
Mathematics
1 answer:
oee [108]3 years ago
3 0
7th grade:  62/120 of the class is made up of girls; (120-62)/120 of boys.
8th grade:  58/120 of the class is made up of boys; (120-58)/120 of girls.

Looking at the info for boys only:  Compare (120-62)/120 with 58/120.  What do you see?

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Find the explicit formula for a 1 =-4,a n =a n-1 +9,n>=2
Mrrafil [7]

Given:

a_1=-4 and a_n=a_{n-1}+9 where n\geq 2.

To find:

The explicit formula for the given recursive formula.

Solution:

We know that recursive formula of an AP is:

a_n=a_{n-1}+d

Where, d is the common difference.

We have,

a_n=a_{n-1}+9

Here, d=9.

The first term of the AP is a_1=-4.

The explicit formula for an AP is:

a_n=a_1+(n-1)d

Substituting a_1=-4 and d=9, we get

a_n=-4+(n-1)9

a_n=-4+9n-9

a_n=-13+9n

Therefore, the required explicit formula for the given sequence is a_n=-13+9n.

6 0
3 years ago
you have reading homework every 6 days and you have science homework every 15 days. If you have homework in both today when will
cluponka [151]
Do you remember when you were learning about the "Least Common
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Well, HERE's where you get to use it.  This question is just looking for
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8 0
4 years ago
How do you express 43.7% as a decimal?
maksim [4K]
43.7 % is equivalent to 0.437 .
8 0
4 years ago
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To which subsets of real numbers does the following number belong? square root of 30
LenaWriter [7]

In order to determine which subset it belongs, we must rewrite

\sqrt(30)

as

\sqrt(30)=\sqrt(2\times \times 3 \times 5)


\Rightarrow \sqrt(30)=\sqrt(2 \times 3\times 5)

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All these three numbers are irrational numbers, hence their product is also irrational


<h2>\Rightarrow \sqrt(30)</h2><h2>belongs to the set of irrational numbers</h2>
6 0
3 years ago
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Alex sold 165 raffle tickets, which was about 70% of the number of tickets sold by his brother Zane. Approximately how many tick
Len [333]

Answer:

115.5 tickets sold.

Step-by-step explanation:

Finding the percent of something is the same as multiplying by that percent as a decimal. So, 70% = 0.70.

0.70 x 165 = 115.5 tickets sold.

4 0
3 years ago
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