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3 years ago

The linear equation y=2x represents the cost y for x pounds of apples.Which ordered pair lies on the graph of the equation?

Mathematics

1 answer:

Yuri [45]3 years ago

8 0

Answer:(1,2), (2,4), (3,6), and alot more here is the graph so you can see!

Step-by-step explanation: hope this helps have a great day!

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If 1 inch represents 65 miles on a map, then how many inches will represent 2210 miles?

Talja [164]

Answer:

Step-by-step explanation:

2210 / 65 = 34. There is no further explanation

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2 years ago

The functions q and r are defined as follows.

Bad White [126]

Answer:

9x = 1-1 is q r x= 2x2 + 2 is 4

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3 years ago

A: What are the solutions to the quadratic equation x2+9=0? B: What is the factored form of the quadratic expression x2+9? Selec

Paraphin [41]

Answer:

A. The solutions are $x=3i,\:x=-3i$ .

B. The factored form of the quadratic expression $x^2+9=(x-3i)(x+3i)$

Step-by-step explanation:

A. To find the solutions to the quadratic equation $x^2+9=0$ you must:

$\mathrm{Subtract\:}9\mathrm{\:from\:both\:sides}\\\\x^2+9-9=0-9\\\\\mathrm{Simplify}\\\\x^2=-9\\\\\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}\\\\x=\sqrt{-9},\:x=-\sqrt{-9}$

$x=\sqrt{-9} = \sqrt{-1}\sqrt{9}=\sqrt{9}i=3i\\\\x=-\sqrt{-9}=-\sqrt{-1}\sqrt{9}=-\sqrt{9}i=-3i$

The solutions are:

$x=3i,\:x=-3i$

B. Two expressions are equivalent to each other if they represent the same value no matter which values we choose for the variables.

To factor $x^2+9$ :

First, multiply the constant in the polynomial by $i^2$ where $i^2$ is equal to -1.

$x^2+9i^2$

Since both terms are perfect squares, factor using the difference of squares formula

$a^2-i^2=(a+i)(a-i)$

$x^2+9=x^2+9i^2=\left(-3i+x\right)\left(3i+x\right)$

5 0

3 years ago

Slope of the line shown below

telo118 [61]

Answer:the slope would be 7/3

Step-by-step explanation:

This is because you write the slope in rise over run form and use the two points provided to get 14/6 and reduce hat number down to 7/3.

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3 years ago

If Train A is moving 66 mph and is 456 miles from the station while Train B is moving 72 mph and is 502 miles away, which train

Len [333]

Answer: train A arrives first

Step-by-step explanation:

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3 years ago