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3 years ago

What is the zero for 2x2-7=4

2 answers:

6 0

2x^2-7=4
subtract 4 from both sdies
2x^2-11=0
therefor
2x^2=11
divide by 2
x^2=5.5
square root both sdies
x=-2.345 or 2.345

mariarad [96]3 years ago

3 0

2x² - 7 = 4
<u>      +7 +7</u>
      <u>2x²</u> = <u>11</u>
      2 2
      x² = 5 1/2
   x = √5 1/2

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You are building a rectangular dog pen with the length is twice as long as the width. You have 120 feet of fencing what are the

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Dimensions are 20 + 20 + 40 + 40

Step-by-step explanation:

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3 years ago

WILL GIVE BRAINLIEST!!

VMariaS [17]

Answer:

$A(-1,4)\to A''(-1,-1)$

$B(0,2)\to B''(1,0)$

$C(1,2)\to C''(1,1)$

$D(-2,4)\to D''(-1,2)$

Step-by-step explanation:

The given trapezoid has vertices at A(−1,4), B(0,2), C(1,2) and D(2,4).

The transformation rule for 90° counterclockwise rotation is

$(x,y)\to(-y,x)$

This implies that:

$A(-1,4)\to A'(-4,-1)$

$B(0,2)\to B'(-2,0)$

$C(1,2)\to C'(-2,1)$

$D(2,4)\to D'(-4,2)$

This is followed by a translation 3 units to the right.

This also has the rule: $(x,y)\to (x+3,y)$

$A'(-4,-1)\to A''(-1,-1)$

$B'(-2,0)\to B''(1,0)$

$C'(-2,1)\to C''(1,1)$

$D'(-4,2)\to D''(-1,2)$

Therefore:

$A(-1,4)\to A''(-1,-1)$

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3 years ago

A field is a rectangle with a perimeter of 1240 feet. The length is 400 feet more than the width. Find the width and length of t

Wewaii [24]

Answer: The length is 510 and the width is 110.

Step-by-step explanation:

To find the area of a rectangle, you will have to add the 2 times the length plus 2 times the width because a rectangle have 4 sides. Two widths and two lengths.

You can now use the formula P= 2l + 2w

were P is the perimeter , l is the length, and w is the width.

the length is 400 more than the width, so we can represent that by the equation, l = w + 400

And now we know that the width is w.

So now we will input the perimeter, length, and into the formula to solve for w.

1240 = 2(w + 400) + 2w

1240 = 2w + 800 + 2w

1240 = 4w + 800

-800 -800

440 = 4w

w = 110

L= 110 + 400

L = 510

Check :

1240 = 2(510) + 2(110)

1240 = 1020 + 220

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3 years ago

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neonofarm [45]

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<h3>How to determine the critical values corresponding to a 0.01 significance level?</h3>

The scatter plot of the election is added as an attachment

From the scatter plot, we have the following highlights

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z = 0.834

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Hence, the critical values corresponding to a 0.01 significance level used to test the null hypothesis of ρs = 0 is (a) -0.881 and 0.881