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monitta
2 years ago
7

A roller coaster has 4 cars, each with the same number of seats. There are 21 passengers seated in the roller coaster, but 3 sea

ts are empty. Write an equation that can be used to determine the number of seats in each car, s. I appreciate any help!
Mathematics
1 answer:
nalin [4]2 years ago
7 0

Answer:

21/4-3

Step-by-step explanation:

Hope this helps! :)

/= divided by.

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What is the solution set of x2 + 5x + 1 = 0?
DerKrebs [107]

Answer:

\huge\boxed{\left\{-\dfrac{5+\sqrt{21}}{2};\ \dfrac{-5+\sqrt{21}}{2}\right\}}

Step-by-step explanation:

x^2+5x+1=0\\\\\text{Use the quadratic formula:}\\\\\text{For}\ ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\\text{if}\ \Delta < 0,\ \text{then the equation has no real solution}\\\text{if}\ \Delta=0,\ \text{then the equation has one real solution}\ x=\dfrac{-b}{2a}\\\text{if}\ \Delta>0,\ \text{then the equation has two real solution}\ x=\dfrac{-b\pm\sqrt{\Delta}}{2a}

\text{We have}\\\\a=1,\ b=5,\ c=1\\\\\Delta=5^2-4(1)(1)=25-4=21>0\\\\x=\dfrac{-5\pm\sqrt{21}}{2(1)}=\dfrac{-5\pm\sqrt{21}}{2}

3 0
3 years ago
Find last year’s salary if, after a 3% pay raise, this year’s salary is $32,960.
belka [17]

Answer:

$32000

Step-by-step explanation:

Let last years salary was $x

Therefore,

x + 3% of x = $32960

x + 0.03x = $32960

1.03x=$32960

x = 32960/1.03

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So, last year's salary was $32000.

3 0
3 years ago
You buy a new computer for $1,500. The value of the computer decreases by 6%
Naya [18.7K]

Answer:

$1171.05

Step-by-step explanation:

1500 × (1-(6 / 100))⁴

5 0
3 years ago
Read 2 more answers
PLEASE HELP !!
Usimov [2.4K]

Answer:

60 months

Step-by-step explanation:

20 000 =  5000 + 250 m

20 000  -  5000   = 250 m

(15 000) / 250 = m = 60 months

3 0
2 years ago
Read 2 more answers
Consider triangle ABC. What is b?
astraxan [27]
B would equal 18.7
Explanation:

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