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Wittaler [7]
3 years ago
7

Write the quadratic equation whose roots are −4 and 2 , and whose leading coefficient is 1 .

Mathematics
1 answer:
charle [14.2K]3 years ago
4 0
Quadratic: ax^2+bx+c
a=1
roots=-4,2
=(x-(-4))(x-2)
=(x+4)(x-2)
=x^2+4x-2x-8
=x^2+2x-8
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Which expression is equivalent to 60^1/2
ella [17]
Please write that as 60^(1/2) for greater clarity.  

Our job here is to find the largest perfect square factor of 60.  Note that 60 = 4*15; 4 is a perfect square, but 15 is not.  

Thus, 60^(1/2) = 2sqrt(15).

7 0
3 years ago
Guys please do the question at the bottom thanks.
vagabundo [1.1K]
7^2 - 3(4-2)^0 - 2(7+3) + 3^2
= 49 - 3 - 20 + 9
= 35

hope it helps

P.S

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6 0
3 years ago
@kaysaja2004<br><br> 2 + 2x = 10
antoniya [11.8K]

Answer:

x=4

Step-by-step explanation:

Isolate the variable, then check.

2 x 4=8

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:)

6 0
3 years ago
Read 2 more answers
An airplane travels at an average speed of 250 mph for 3 hours.
spayn [35]
250 × 3 = 750

Your answer is D. <span>750 mi</span>
3 0
3 years ago
Alexa has $60 already saved and her sister Susan has $120 already saved. Alexa is saving $7 per week and her sister is saving $5
masha68 [24]

Step 1:

The variable is the number of weeks needed to equalize Alexa and her sisters savings.

Step 2:

7x + 60 = 5x + 120

Step 3:

7x+60=5x+120

Subtract 60 from both sides.

7x+(60-60)=5x+(120-60)

7x=5x+60

Subtract 5x from both sides

7x-5x=5x+60-5x

2x=60

Divide both sides by 2.

2x/2 = 60/2

x=30

Step 4:

7(30) + 60 = 5(30)+ 120

210+60=150+120

270 = 270

Step 5:

To find the unknown amount of weeks, you need to rewrite the equation isolate x on the left-hand side of the equation. I just subtracting/simplified the equation until I could solve it.

(tbh got stuck on this one)

6 0
3 years ago
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