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zhenek [66]
3 years ago
10

Y=2 when x=3 what is the valve of y when x=9

Mathematics
2 answers:
ozzi3 years ago
3 0
I came up with when x=9, y=6.
tatyana61 [14]3 years ago
3 0
2/3 *y/9
 Cross multiply then solve for y.
2*9=3y
18=3y

18/3=3y/3
6=y
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Sarah had a balance of $162 in her bank account at the start of the week. She withdrew $63.50 on Monday, $23.25 on Wednesday, an
lozanna [386]

Answer:

Less; $25.90 less than at the beginning of the week

Step-by-step explanation:

162-(63.50+23.25+26.45)=162-113.20=48.80

48.80+87.30=136.10; 162>136.10

162-136.10=Δ$25.90

$25.90 less

8 0
2 years ago
An orchestra of 25 members bought tickets, at all different prices, to a concert, and the mean price paid was $82. A new musicia
QveST [7]

Answer:

$82.31

Step-by-step explanation:

First, we need to find the total amount of money paid

82 * 25 = 2050\\

Next, add the new price for the new total

2050 + 90 = 2160

Now divide by total members (25 +1 = 26)

2160 / 90 = $82.31

4 0
3 years ago
7x - y = - 1 + -7x + 3y = - 25
Fittoniya [83]
Hope this helps you out :D

It’s 2 equations so in order to solve the previous system, you can use different methods, as for example substitution or addition of equations. In this case, you use the second one, due to the fact you have 7x in one equation and -7x in the other equation. In this way you can easily eliminate variable x and then solve for y. With the value of y you can replace in any of the two equations and solve for x.

7x-y=-1
-7x+3y=-25

Summarizing, you proceed as follow:
- add up the given equations

7x - y = -1

-7x+3y=-25
——————
0 +2y=-26

- solve for y in the previous equation

2y=-26
y=-26/2
y=-13


- replace the obtained value of y in one of the given equations, and solve for x

7x-(-13)=-1

7x+13=-1

7x=-1-13

7x=-14

x=-14

x=-14/7

x=-2


Hence, the solution of the given systems of equation is:

X=-2

Y=-13

4 0
3 years ago
Find the first fourth and eighth terms of A(n)=-2•5^n-1
Mila [183]
The first term is 0. The fourth is 1000. The eighth term is 10,000,000. All you have to do is plug the term you want to find into n and then solve.
5 0
3 years ago
This is a sketch of the curve with equation y = f(x).
Katen [24]

Answer:

We have to use the formule to calculate the vertex which is: V(-b/2a;4ac-b^2/4a)

A) y=x+7 where a=1 b=0 and c=7

By replacing we have: V(0;28/4) V(0;7)

B) y=-x where a=-1 b and c=0 so V(0,0)

6 0
3 years ago
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