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stiv31 [10]
2 years ago
7

15 points for someone who can answer & explain this to me thanks

Mathematics
1 answer:
iris [78.8K]2 years ago
8 0

Answer:

see explanation

Step-by-step explanation:

Given

\frac{9}{a^2+9a+20} , \frac{7a}{a^2+11a+28}

Factor the denominators of both fractions

\frac{9}{(a+4)(a+5)} , \frac{7a}{(a+4)(a+7)}

The lowest common denominator of both fractions is (a + 4)(a + 5)(a + 7)

Multiply numerator/denominator of first fraction by (a + 7)

Multiply numerator/denominator of second fraction by (a + 5 )

\frac{9(a+7)}{(a+4)(a+5)(a+7)} , \frac{7a(a+5)}{(a+4)(a+5)(a+7)} , then

\frac{9a+63}{(a+4)(a+5)(a+7)} , \frac{7a^2+35a}{(a+4)(a+5)(a+7)}

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pls help.... Natalie plans to run 5 miles every week for 3 weeks. The first day of the first week she ran 1 1/5 miles. How mant
yarga [219]

Answer:

3 4/5

Step-by-step explanation:

If Natalie runs 5 miles each week and she already ran 1 1/5 then she will need to run 3 4/5.

5 - 1 1/5 = 3 4/5

7 0
1 year ago
Which equation listed below, when solved, shows how to find the circumference of a circle if the diameter is 6 inches? Use 3.14
dangina [55]

Answer:

C = π(6)

C = 6π

C = 18.84

Step-by-step explanation:

The circumference is the distance around the circle. It relates the number of times the diameter will encircle the circumference as 3.14 or π. As a result, the formulas for the circumference of a circle are C = 2πr or C = πd. The information given is the diameter so use C = πd by substituting d = 6.

C = π(6)

C = 6π

C = 18.84

6 0
2 years ago
Jimmy Andrew and Richard collect comic books. Jimmy has five more comic books than Andrew, and Richard has four times as many co
adell [148]

Answer: Andrew = 20

Jimmy = 25

Richard = 100

Step-by-step explanation:

Let the number of Andrew's comic books be y.

Jimmy has five more comic books than Andrew. This means Jimmy has: y+5

Richard has four times as many comic book as jimmy. This means Richard has: 4(y+5) = 4y + 20

Since there are 145 comic books together. This can be rewritten as:

y + (y+5) + (4y+20) = 145

6y+25 = 145

6y = 145 - 25

y = 120/6

y = 20

Andrew has 20 comic books

Jimmy has five more comic books than Andrew. Jimmy has: 20+5 = 25

Richard has: 4y + 20 = 4(20) + 20 = 100

5 0
3 years ago
For the data set given below, calculate the 70th percentile. (answer with an integer or decimal.) 24 45 52 78 90 120 34 67 111 1
Mashutka [201]

we know that

To calculate the percentile of a data set, we should first order all the values in the data set from smallest to largest.


[10,24,34,45,52,67,78,90,111,120]


As their are
10
data points

and
70% of this is
(70/100)*10=7

Take the index and the next greatest number and find the average.

Because,the index is a whole number

so

[10,24,34,45,52,67,78,90,111,120]

(78+90) /2=84

so

70th
percentile is equal to 84



the answer is

The 70th percentile is 84

7 0
3 years ago
Read 2 more answers
What is the answer please help ASAP !!!!
Julli [10]

Answer:

6 2/3 meters per second

Step-by-step explanation:

800 meters in 2 minutes

Change the minutes to seconds

We know 1 minutes =60 seconds so 2 minutes is 120 seconds

Take the 800 meters and divide by 120 seconds

800/120 =6.66666666 meters per second

6 2/3 meters per second

4 0
3 years ago
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