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3 years ago

Complete the statement.

Mathematics

1 answer:

aleksley [76]3 years ago

5 0

Didnt feel like doing them all , i only attempted to answer the first one which is " a " ( -6 ) hope i helped :)

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Please help!!! Please!!!!<br>

ira [324]

Answer:

Theres a 90 degree angle

90 - 25 = 65 divided by 5 = 13

<h2>13 should be your anwser!</h2>

3 0

3 years ago

What is the product of (-0.39)(-0.06)(0.29)

adell [148]

Answer:

0.006786

Step-by-step explanation:

(-0.39)(-0.06)= 0.0234

0.0234(0.29)=0.006786

8 0

4 years ago

An auditorium with 52 rows is laid out where 6 seats comprise the first row, 9 seats comprise the second row, 12 seats comprise

ivanzaharov [21]

The number of seats per row generate an arithmetic sequence. Let $a_n$ denote the number of seats in the $n$ -th row. We're told that the number of seats increases by 3 per row, so we can describe the number of seats in a given row recursively by

$\begin{cases}a_1=6\\a_n=a_{n-1}+3&\text{for }2\le n\le52\end{cases}$

The total number of seats is given by the summation

$\displaystyle\sum_{n=1}^{52}a_n$

Because $a_n$ is arithmetic, we can easily find an explicit rule for the sequence.

$a_n=a_{n-1}+3$
$a_n=(a_{n-2}+3)+3=a_{n-2}+2\cdot3$
$a_n=(a_{n-3}+3)+2\cdot3=a_{n-3}+3\cdot3$
$\cdots$
$a_n=a_1+(n-1)\cdot3$

So the number of seats in the $n$ -th row is exactly

$a_n=6+(n-1)\cdot3=3+3n$

This means the total number of seats is

$\displaystyle\sum_{n=1}^{52}a_n=\sum_{n=1}^{52}(3+3n)=3\left(\sum_{n=1}^{52}1+\sum_{n=1}^{52}n\right)$

You should be familiar with the remaining sums. We end up with

$\displaystyle\sum_{n=1}^{52}a_n=3\left(52+\dfrac{52\cdot53}2\right)=4290$

3 0

3 years ago

The weekly cost per person to rent a cottage on a lake varies inversely with the number of people who share the cost. When four

liberstina [14]

A) When the relation is inverse, the product of the two related values is a constant. Here we have
n·c = 4·312
n·c = 1248 . . . . an equation relating n and c
You can rearrange this to
c = 1248/n

B) Using 6 for n, we have
c = 1248/6 = 208
The cost per person decreases from 312 to 208, so decreases by $104.

5 0

3 years ago

Quadrilateral CDEF is reflected across the x-axis and translated 3 units left to create quadrilateral GHJK .

PilotLPTM [1.2K]

Answer- KG⎯∥JH⎯

the given figure is a trapezium in which CF||DE

Reflection of figure CDEF and shifting it by 3 units does not change the shape of the figure but changes only its position in the x-y plane.

so, the shape of the figure GHJK will be same as that of CDEF.

so sides, KG⎯∥JH⎯

6 0

3 years ago