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Zigmanuir [339]
3 years ago
9

Plz help me with math pt.2

Mathematics
1 answer:
Dominik [7]3 years ago
8 0

Answer:

two hundred forty-five thousand six hundred ninety-eight

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How do you substitute x+y=2 3x+2y=5
Monica [59]
Here's how you solve this.  So, x+y=2, right?  Let's isolate x.  x+y-y=2-y.  x=2-y.  NOW, if x=2-y, in 3x+2y=5, we can REPLACE x with 2-y and use it to solve for y!  3x+2y=5.  3(2-y)+2y=5.  (3*2)+(3*-y)+2y=5.  6+(-3y)+2y=5.  6+(-y)=5.  6+(-y)-6=5-6.  -y=-1.  -y/-1=-1/-1.  y=1.

So, if y=1, we can substitute that back into either equation--but let's go with the easier one, x+y=2.  x+1=2.  x+1-1=2-1.  x=1.  1+1=2, so that works; let's check the other equation.  3(1)+2(1)=5.  3+2=5.  5=5.  That's correct!

Answer: x=1, y=1
4 0
3 years ago
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What is an equation for the line with slope 2/3 and y-intercept 9
Contact [7]
The equation of a line is y-mx+b with m being slope and b being y-intercept. Using the values provided in your problem, your answer would be y=2/3x+9, or C.
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3 years ago
Does 2, square root of 2, and square root of 2 make a right triangle
garik1379 [7]
Yes it does because in order to find out if a triangle is a right triangle, you can use the Pythagorean theorem.
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simplify this:
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The number 2400 is first increased by 30%.The value obtained is next decreased by 20%.Find the final number
kvasek [131]

<em>2400 is increased by 30%.</em>

so,

2400 + (30/100 * 2400)

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2400 + 720

3120

<em>this number is decreased by 20%.</em>

so,

3120 - (20/100 * 3120)

3120 - (2 * 312)

3120 - 624

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therefore, the final number will be 2496.

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Is -x^2+5x-21 linear or not?
MA_775_DIABLO [31]
It is not linear because x is raised to the second power. Therefore it is not straight and would be kindof like a rainbow cut in half on the graph..
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3 years ago
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