Number 20 pls I need help with this one

Mathematics

1 answer:

Norma-Jean [14]3 years ago

3 0

He uses 5/8 tanks of gas in one week.

In 5 he will use, 5/8 *5 = 25/8 in 5 weeks
This can be simplified too:
3.125 tanks of gas

The answer is, 25/8 tanks of gas or 3.125 tanks of gas

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7. Which of the following statements is not

Amiraneli [1.4K]

Answer:

Step-by-step explanation:

it is because in (a) the square root of 112. is 10.58 which is in between 10 and 11

(B) the square root of 180 is 13.42 which is between 13&14

6 0

3 years ago

The fifth term of an arithmetic sequence is 100, and the common difference is 4. Find the first three terms of the sequence.

Ronch [10]

$\bf a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term}\\
d=\textit{common difference}\\
--------------\\
a_5=100\\
n=5\\
d=4
\end{cases}
\\\\\\
a_5=a_1+(5-1)4\implies 100=a_1+(5-1)4
\\\\\\
\textit{solve for }a_1\textit{ to find the first term}$

then use the common difference "d", to get the 2nd and 3rd terms

-------------------------------------------------------------------------------------------

$\bf a_5=a_1+(5-1)4\implies 100=a_1+(5-1)4\implies 100=a_1+(4)4
\\\\\\
100=a_1+16\implies 100-16=a_1\\\\ 84=a_1\quad 
\begin{cases}
a_1=&84\\
a_2=84+4\to &88\\
a_3=88+4\to &92
\end{cases}$

6 0

3 years ago

Find a formula for the nth term

DENIUS [597]

Answer:
Given,a= -2 and d=8

an=a+(n-1)d
= -2+(n-1)8
= -2+8n-8
=8n-10

Hope it help you

Please mark me brainliest

6 0

2 years ago

3x + 2y= 12<br><br> y = = x – 9<br> how do i solve this for substitution??

iren2701 [21]

In Point form: (6,-3)

In Equation form: x = 6, y = -3

Step-By-Step: