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KIM [24]
3 years ago
10

For the line y = 2/5x, if the y-coordinate is 20, what is the x-coordinate? A. 5/2 B. 50 C. 125 D. 8

Mathematics
2 answers:
kykrilka [37]3 years ago
5 0
Ok here is how you do this:
you need to replace y with 20 and then solve to find x, i.e. solve this equation
20=2/5x

1. Simplify 2/5x to 2x/5
   20=2x/5

2. Multiply both sides by 5
    20 * 5=2x

3. Simplify 20 * 5 to 100
    100=2x

4. Divide both sides by 2
   100/2=x

5. Simplify 100/2 to 50
     50=x

6. Switch sides
     x=50
so your answer is B. 50
I hope this helped!
aliya0001 [1]3 years ago
5 0
<span>Replace y with 20 and the solve to find x, i.e. solve this equation:\[20=\frac{2}{5}x\]</span>
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The sides of a rectangle have length x+ 2 and width x -5. Which equation describes the area, A, of the rectangle in terms of x?​
Yakvenalex [24]

Answer:

The area in factored form is A=(x+2)(x-5).

The area in standard form is A=x^2-3x-10.

Step-by-step explanation:

The area of a rectangle is length times width.

So the area here is (x+2)(x-5).

They are probably not looking for A=(x+2)(x-5) because it requires too little work.

They probably want A in standard form instead of factored form.

Let's use foil:

First x(x)=x^2

Outer: x(-5)=-5x

Inner: 2(x)=2x

Last: 2(-5)=-10

---------------------Adding together:  x^2-3x-10.

The area in factored form is A=(x+2)(x-5).

The area in standard form is A=x^2-3x-10.

4 0
2 years ago
A student draws several cards from a deck of 10 unique cards.
egoroff_w [7]

Answer:

There are 210 different ways that 4 cards can be drawn.

There are 252 different ways that 5 cards can be drawn.

There are 120 different ways that 7 cards can be drawn.

Step-by-step explanation:

Use the combination formula

10C4 =210

10C5 = 252

10C7 = 120

6 0
2 years ago
Delray is starting a small computer business he apply to his bank for a loan of $12000. If the interest rate is 11% find the int
DENIUS [597]

I believe the answer would be $13,320.

Hope this helps ;}

5 0
3 years ago
2x + 4y = 14 and 3x – 4y = -39 solve by elimination
gizmo_the_mogwai [7]

Answer: x=-5 and y=6

Step-by-step explanation: i hope i did it right tell if i didnt

5 0
3 years ago
Two quantities, Pand Q, are connected by
frez [133]

Answer:

P = 0.5Q - 20

Step-by-step explanation:

P = kQ + c

substitute Q = 60 , P = 10 into the equation

10 = 60k + c → (1)

substitute Q = 240, P = 100 into the equation

100 = 240k + c → (2)

subtract (1) from (2) term by term to eliminate c

90 = 180k ( divide both sides by 180 )

\frac{90}{180} = \frac{1}{2} = 0.5 = k

substitute k = 0.5 into (1) and solve for c

10 = 60(0.5) + c

10 = 30 + c ( subtract 30 from both sides )

- 20 = c

then

P = 0.5Q - 20

8 0
2 years ago
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