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miskamm [114]
3 years ago
6

What is y equal to when x= -2 Y=-x+4

Mathematics
1 answer:
Alex17521 [72]3 years ago
5 0

Y= -2+4

If X equals -2, you want to plug -2 in for X.

I hope I helped!

:)

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How does this work?????
ankoles [38]

Answer:

x = 4\sqrt{5}

Step-by-step explanation:

Since the triangle is right, solve for x using Pythagoras' identity, that is

x² = 8² + 4² = 64 + 16 = 80

Take the square root of both sides

x = \sqrt{80} = \sqrt{16(5)} = \sqrt{16} × \sqrt{5} = 4\sqrt{5} ← exact value



3 0
3 years ago
4. Here is a linear equation: y=1/4 x + 5/4
4vir4ik [10]

Step-by-step explanation:

"Solutions to the equation" just means that they are points on the line. To find out if these two points land on this line, plug each one in, like this:

1.5 = (1/4)(1) + (5/4)

1.5 = (1/4) + (5/4)

1.5 = (6/4)

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Since the expression is true, this point is on the line.

Do the same process for the second point (remember a point is formatted (x,y)) and see if it is also a point on the line.

To find the x-intercept, simply plug in 0 for y and see what you get. It should look like (x,0).

7 0
2 years ago
A diabetes drug cost $78 online. This cost is 75% of the cost of the
alexgriva [62]

Answer:

$104

Step-by-step explanation:

If the cost in the store is x we can write:

75%x = 78

0.75x = 78

x = 78 / 0.75 = 104

5 0
3 years ago
Read 2 more answers
One increased by 7 times a number is the same as 5 times the number plus 25
sammy [17]

Answer:

12

Step-by-step explanation:

Let the number = x

7x + 1 = 5x + 25                 Subtract 5x from both sides.

7x - 5x + 1 = 5x - 5x + 25   Combine

2x + 1 = 25                          Subtract 1 from both sides.

2x + 1 - 1 = 25-1                   Combine

2x = 24                               Divide by 2

2x/2 = 24/2

x = 12

4 0
3 years ago
10 - 3 (z - 2) = 5z + 7
Alla [95]

Answer:

= 9/8

That's the answer

7 0
3 years ago
Read 2 more answers
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