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Vesnalui [34]
3 years ago
13

What is the y-coordinate for the solution to the system of equations? {−x+3y=9 {y=2/3x

Mathematics
1 answer:
shusha [124]3 years ago
7 0

Answer:

y = 6

Step-by-step explanation:

3 y - x = 9

y = (2 x)/3

Substitute y = (2 x)/3 into the first equation:

{x = 9

y = (2 x)/3

Substitute x = 9 into the second equation:

Answer:

x = 9

y = 6

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For what value of y does 125 = (StartFraction 1 Over 25 EndFraction) Superscript y minus 1? Negative five-halves –2 –1 Negative
rodikova [14]

Answer:

D. -1/2

Step-by-step explanation:

First to rewrite the equation in numbers

125=\frac{1}{25}^{y-1}

First, we need to find what exponent would get 1/25 to 125.

\frac{1}{25}^{y}=125

Sense 1/25 is a fraction we must use a negative exponent to make it a whole number. We can just find what exponent would get 25 to 125 then make it negative. 1 wouldn't be enough and 2 would be too much so y is between 1 and 2 into negative is between -1 and -2. Sense the original equation has (y-1) the only option you can subtract 1 from to get between -1 and -2 is -1/2 which would give -1 1/2.

7 0
2 years ago
Solve for q:2- 5/q=16
fredd [130]
2-5/q=16
-5/q =2=16
(-5)+qx2/q=16
q=-5/14
4 0
3 years ago
Melissa wants to cover a square table with tiles. if she uses exactly 100 tiles, which could be the length of one side?
Eduardwww [97]

Answer:

The length of one side is 25 tiles

Step-by-step explanation:

Given

Tiles = 100

Required

Determine the length of one side

The given parameter represents the perimeter of the table

Since the table is a square, then

Perimeter = 4L

Substitute 100 for Perimeter

100 = 4L

Solve for L

L= 100/4

L = 25

Hence:

<em>The length of one side is 25 tiles</em>

3 0
3 years ago
You might need: Calculator
Fudgin [204]

Answer:

Area = 153.8 cm/ m

Step-by-step explanation:

Area of circle = 22 ÷ 7 × r²

= 22 ÷ 7 × (7²)

= 22 ÷ 7 × 49

= 3.14 × 49

= 153.8 cm/ m

8 0
3 years ago
If gas costs $2.24, and you travel 738 miles in a SUV that gets 18 miles per gallon.
pychu [463]

Answer:

divide the number of miles you tried by the number of miles per ga;

738/18 = 41 gluons.

now multiply 41 x $2.24 = $9q.84


7 0
4 years ago
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