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vredina [299]
3 years ago
8

Can someone please help me with this math question please. Please

Mathematics
1 answer:
ddd [48]3 years ago
3 0

9514 1404 393

Answer:

  14. (x, y) = (1, 3)

  15. $6200

Step-by-step explanation:

14. Substitution is a nice strategy for this one, since we have an expression for y. Using the second equation in the first, we get ...

  4x +(2x+1) = 7

  6x +1 = 7 . . . . . . . collect terms

  6x = 6 . . . . . . . subtract 1

  x = 1 . . . . . . . divide by 6

  y = 2(1) +1 = 3 . . . . substitute for x in the second equation

The solution is (x, y) = (1, 3).

__

15. The formula for the balance when the investment earns simple interest is ...

  A = P(1 +rt)

where P is the principal invested, r is the annual rate, and t is the number of years.

For the given values, we find the account balance to be ...

  A = $5000(1 +0.04·6) = $5000·1.24 = $6200

Jacob will have $6200 in his account after 6 years.

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8 0
3 years ago
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What is the value of x?<br> x+10<br> 105
sashaice [31]
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6 0
2 years ago
Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule. A(n)=-6+(n-1)(1/5) A)-6,-5 1/5,
scoundrel [369]

Step-by-step explanation:

An arithmetic sequence is given by relation as follows :

A(n)=-6+(n-1)\dfrac{1}{5}

For the first term, put n = 1. So,

A(1)=-6+(1-1)\dfrac{1}{5}\\\\A(1)=-6

For fourth term, put n = 4. So,

A(4)=-6+(4-1)\dfrac{1}{5}\\\\A(4)=\dfrac{-27}{5}\\\\A(4)=-5\dfrac{2}{5}

For tenth term, put n = 10. So,

A(10)=-6+(10-1)\dfrac{1}{5}\\\\A(10)=-6+\dfrac{9}{5}\\\\A(10)=\dfrac{-21}{5}\\\\A(10)=-4\dfrac{1}{5}

Hence, the correct option is (C).

7 0
3 years ago
Pls help for number 6
Vlad1618 [11]
A: 45x + 30y = 1350
Since we don’t know how many adults and children are in the group, we use x and y

b: x-intercept= 30 y-intercept=45
To find the x-intercept you need to isolate the variable. 45x/45 = x
Then you do the same thing to the other side. 1350/45 = 30
So x=30
Same thing with the y-intercept.
30y/30 = y 1350/30 = 45
y=45 (Not really sure what it means by “what they represent” but I thinks it’s that there are 30 adult tickets and 45 children tickets )

c: so our points are (30,0) and (0,45) so you would graph that.
To find how many children tickets were bought if there were 20 adult tickets just look at the photo I put. I don’t know how to explain this.


Hope this helps

7 0
3 years ago
I have tried multiple times to do this many different ways and I have not gotten the correct answer. #9
hodyreva [135]

It's 1.18^{10}  which gives 5.23 times increase in 10 years, so 523% of oryginal price

5 0
3 years ago
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