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3 years ago

In an arithmetic sequence, the seventh term is −9 and the nineteenth term is 39.

Mathematics

1 answer:

Stella [2.4K]3 years ago

3 0

Answer:

37.5% that is the answer

Step-by-step explanation:

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Rebecca ran 21 miles in 5 hours. If she ran at a constant speed, how many miles did she run in 2 hours? 8.4 miles 42 miles 4.2 m

Sholpan [36]

Answer: 8.4 miles

Step-by-step explanation:

d = rt

Solve for her rate

21 = 5r

r = 21/5

r = 4.2

Solve for if the time is 2 hours and rate (solved previously) is 4.2

d = 4.2*2

d = 8.4

6 0

3 years ago

What is y=3x-14 in standard form

Dafna1 [17]

$The\ standard\ form:Ax+By=C\\\\=================\\\\y=3x-14\\\\3x-14=y\ \ \ \ \ \ |add\ 14\ to\ both\ sides\\\\3x=y+14\ \ \ \ \ \ |subtract\ y\ from\ both\ sides\\\\3x-y=14$

4 0

3 years ago

Read 2 more answers

Natalie paid $14.99 to join an online music service. If she purchases 9 songs each month at a cost of $0.99 per song, what will

ycow [4]

Answer:

Natalie Spent $59.54 on songs after 5 months at online music service.

Step-by-step explanation:

Total membership cost =$14.99

Number of songs purchased in each month = 9

Cost per song = $0.99

We need to find total amount she had spent after 5 months.

Solution:-

So First we will Number of songs purchased in 5 months.

1 month = 9 songs

So in 5 months = Songs purchased in 5 months.

By Using Unitary method we get;

Songs purchased in 5 months =

Now Also Given:

1 song = $0.99

45 songs = Cost for 45 songs.

Again by using Unitary method we get;

Cost for 45 songs =

No Total Amount Natalie spent after 5 months is equal to Total membership cost plus Cost of songs purchased in 5 months.

framing in equation form we get;

Total Amount Natalie spent =

Hence Natalie Spent $59.54 on songs after 5 months at online music service.

5 0

2 years ago

Read 2 more answers

In the United States, the distribution of a female's height has a mean of 64 inches with a standard deviation of 3 inches. How m

inessss [21]

Answer:

The standard deviations is $\frac{-5}{3}$

Step-by-step explanation:"

Given mean female height = 64 inches and standard devaiton = 3 inches and 69 inches tall is Sally.

We know the distance of a data point from:

Z = $\frac{64-69}{3}$ = $\frac{-5}{3}$

So the standard deviations is $\frac{-5}{3}$

8 0

3 years ago

How do you solve this equation?

Natasha2012 [34]

Answer:

$5 \sqrt{2}$

= 7.071067812

Step-by-step explanation:

hope this helps

8 0

2 years ago