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777dan777 [17]
3 years ago
5

Which equation shows y=3x−15 in standard form? 5x−15y=−1 5x−15y=1 15x+5y=−1 15x−5y=1

Mathematics
1 answer:
Alja [10]3 years ago
3 0

Answer:

3x-y=15 should be the answer

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What is the vertex form of Y = x2 - 6x + 6?
ahrayia [7]

Answer:

\large\boxed{y=(x-3)^2-3}

Step-by-step explanation:

The vertex form of a quadratic equation <em>y = ax² + bx + c:</em>

<em>y = a(x - h)² + k</em>

(h, k) - coordinates of a vertex

We have the equation <em>y = x² - 6x + 6</em>.

Convert to the vertex form:

y=x^2-2(x)(3)+6\\\\y=\underbrace{x^2-2(x)(3)+3^2}_{(*)}-3^2+6\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\qquad(*)\\\\y=(x-3)^2-9+6\\\\y=(x-3)^2-3\to h=3,\ k=-3

7 0
2 years ago
Using the equation y = 3x – 5, what would the output be for an input of 2
Licemer1 [7]

Answer:

Step-by-step explanation:

y = 3x - 5.....input values are x and output values are y

so if ur input (x) is 2.....sub 2 in for x and find ur output (y)

y = 3x - 5

y = 3(2) - 5

y = 6 - 5

y = 1 <=== ur output value

3 0
3 years ago
Find 7x+y when x=4 and y=5. *
Alexeev081 [22]

Answer:

7x+y, when x+4 and y+5

7(4) + 5=

28+5=

33

Step-by-step explanation:

Hope this helps. :)

7 0
3 years ago
2 short answer questions.
nasty-shy [4]
For the first one your equation is h(d)=3/7d+5
If d represents the number of days and the question is wanting to know the height after 1 week (7 days) then you would get this equation once 7 is in the place of d
h(d)=3/7(7)+5
When solved you answer is 8 inch. 

For the second one your equation is f(x)=75x+250
If x represents the number of weeks and the question is asking how much money Sam will have after 12 weeks then you will get this equation once putting in 12
f(x)=75(12)+250
Once solved you will get the answer $1150

Hope this helps! :)
8 0
3 years ago
A train travels 58 kilometers in 4 hours, and then 80 kilometers in 4 hours. What is its average speed?
Olegator [25]
Average speed  = 

                 (total distance covered) / (time to cover the distance).

Total distance covered = (58km + 80km) =  138 km

Time to cover the distance = (4hr + 4hr) =  8 hours

Average speed  =  138km / 8hr  =  17.25 km/hour .

(That's less than 11 mph.  You could bike there faster!)
7 0
2 years ago
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