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3 years ago

40% of the students on a field trip love the museum. If there are 20 students on the field trip, how many love the museum?

Mathematics

1 answer:

ss7ja [257]3 years ago

5 0

If there's a total of 20 students and 40% love the museum. 20 * .40 = 8 students love the museum.

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1/6 time 3/7<br><br><br> Help I just get different answer

hodyreva [135]

1*3=3
6*7=42
3/42 can be simplifyed
to 1/14

3 0

3 years ago

Which statement is true about parallel lines? PLEASE HURRY

Blizzard [7]

Answer:

They do not intersect, but are coplanar

Step-by-step explanation:

Parallel lines are coplanar (they lie in the same plane) and never intersect.

6 0

3 years ago

Read 2 more answers

What is the sum of the geometric series

lbvjy [14]

If $S$ denotes the sum of the first $n$ terms of a geometric series with first term $a$ and common ratio $r$ , then

$S=a+ar+ar^2+\cdots+ar^{n-3}+ar^{n-2}+ar^{n-1}$
$rS=ar+ar^2+ar^3+\cdots+ar^{n-2}+ar^{n-1}+ar^n$
$\implies S-rS=a+(ar-ar)+(ar^2-ar^2)+\cdots+(ar^{n-1}-ar^{n-1})-ar^n$
$\implies (1-r)S=a(1-r^n)$
$\implies S=a=\dfrac{1-r^n}{1-r}$

Using summation notation, you have

$S=\displaystyle\sum_{x=1}^nar^{x-1}=\sum_{x=0}^{n-1}ar^x=a\dfrac{1-r^n}{1-r}$

In this case, you have $a=2$ , $r=\dfrac12$ , and $n=16$ . So the value of the sum is

$\displaystyle\sum_{x=0}^{15}2\left(\frac14\right)^x=2\dfrac{1-\left(\frac14\right)^{16}}{1-\frac14}\approx2.67$

Rounded to the nearest whole number, the answer would be 3.

4 0

3 years ago

Read 2 more answers

Marla’s School has 1,030 students. Kim’s school has 3 times as many students as Sandi’s School. Write an equation to find the nu

DENIUS [597]

Answer:

3090

Step-by-step explanation:

times 1,030 to 3.

6 0

3 years ago

Which equation is y = 3(x – 2)2 – (x – 5)2 rewritten in vertex form?

Alenkinab [10]

Y= 3( x -2 )² - ( x-5 )² = 3 ( x² - 4 x + 4 ) - ( x² - 10 x + 25 ) =
= 3 x² - 12 x + 12 - x² + 10 x - 25=
= 2 x² - 2 x - 13 =
= 2 ( x² - x + 1/4 - 1/4 ) - 13 =
= 2 ( x - 1/2 )² - 1/2 - 26/2 = 2 ( x - 1/2 )² - 27/2
Answer: D)

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3 years ago