Ask question

Ask question

All categories

3 years ago

10

Lucy drove387 miles using 18 gallons of gas.at this rate how many miles would she drive using 11 gallons of gas

1 answer:

Nata [24]3 years ago

4 0

Answer:

236.5 miles

Step-by-step explanation:

Because it is 21.5 miles per one gallon of gas.

You divide 387 by 18 to get 21.5 then multiply 21.5 by 11

You might be interested in

Calculate the arithmetic sequence in which a9=17 and the common difference is d=-2.1

jek_recluse [69]

Answer:

$S_{31}=71.3$

Step-by-step explanation:

The nth term of an arithmetic sequence is given by the formula,

$U_n=a_1+(n-1)d$

We were given that the 9th term is $17$ .

$\Rightarrow 17=a_1+(9-1)(-2.1)$

$\Rightarrow 17=a_1+(8)\times(-2.1)$

$\Rightarrow 17=a_1-\frac{84}{5}$

$\Rightarrow 17+\frac{84}{5}=a_1$

$\Rightarrow a_1=\frac{169}{5}$

The sum of the first n-terms is given by the formula,

$S_n=\frac{n}{2}(2a_1+(n-1)d)$

To find $S_{31}$ , we substitute $n=31$ , $a_1=\frac{169}{5}$ and $d=-2.1$ .

$\Rightarrow S_{31}=\frac{31}{2}(2(\frac{169}{5}+(31-1)(-2.1))$

$\Rightarrow S_{31}=\frac{31}{2}(2(\frac{169}{5}+(30)(-2.1))$

$\Rightarrow S_{31}=\frac{31}{2}(\frac{23}{5})$

$\Rightarrow S_{31}=\frac{713}{10}$

$\Rightarrow S_{31}=71.3$

The correct answer is D

8 0

3 years ago

Read 2 more answers

If i have 45 pen is ;) and 90 coins how much is that total

Delicious77 [7]

Answer:

40.90

Step-by-step explanation:

I do not know what pen is but if it is dollars then....

4 0

3 years ago

An account earns simple interest. $300 at 4% for 3 years a. Find the interest earned. $ b. Find the balance of the account. $

aliina [53]

A. take 300*0.04*3 which is $36

b. add $36 to $300

5 0

3 years ago

Read 2 more answers

There are 300 students. for every 8 are boys, and for every seven are girls. how many boys?

katen-ka-za [31]

8+7=15
300/15=20
8 x 20 =160 Boys
7 x 20 = 140 girls

140 + 160 = 300

Hope this helps!

4 0

2 years ago

If EFGH is a trapezoid, find its perimeter.

Serjik [45]

40.5
Trust me i did it and got it right!! if its wrong lmk and i can explain it for u

5 0

2 years ago