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AveGali [126]
3 years ago
14

Michelle wants to buy a new phone. There are several stores that sell the phone she wants, and each store offers

Mathematics
1 answer:
yaroslaw [1]3 years ago
4 0

Step-by-step explanation:

hey, hope it helps.. :))

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Solving Square Root Worksheet (x - k)^2 Part 3
erastova [34]

Answer:

7. x = -2 +/- 4i\sqrt{5}

8. x = 2 or x = 6

9. x = -2 +/- \frac{\sqrt{26} }{2} i

10. t = -3 +/- \sqrt{35}

Step-by-step explanation:

7. Subtract 320 from both sides: 4(x + 2)^2 = -320

Divide by 4: (x + 2)^2 = -80

Square root both sides: x + 2 = +/- \sqrt{-80}. We need to add the imaginary i to this: +/- \sqrt{-80} = +/- i\sqrt{80} = +/- 4i\sqrt{5}

Subtract 2 from both sides: x = -2 +/- 4i\sqrt{5}

8. Add 18 to both sides: 7(x - 4)^2 = 28

Divide by 7: (x - 4)^2 = 4

Square root both sides: x - 4 = +/- 2

Add 4 to both sides: x = 4 +/- 2  ⇒  x = 2 or x = 6

9. Add 5 to both sides: -2(x + 2)^2 = 13

Divide by -2: (x + 2)^2 = -13/2

Square root both sides: x + 2 = +/- \sqrt{-13/2}. We again need i: +/- \sqrt{-13/2} = +/- i\sqrt{13/2} = +/- \frac{\sqrt{26} }{2} i

Subtract 2 from both sides: x = -2 +/- \frac{\sqrt{26} }{2} i

10. Multiply by 5 on both sides: (t + 3)^2 = 35

Square root both sides: t + 3 = +/- \sqrt{35}

Subtract 3: t = -3 +/- \sqrt{35}

Hope this helps!

3 0
4 years ago
Read 2 more answers
PLEASE HELP! I'll literally mark BRAINLIEST if the answer is correct!
VMariaS [17]

Answer:

A: M= 100 - w=20 = M-0

 ( if he has 100 dollars n he buys a 5 dollar coffee every week then he will have 0 dollars left over in 20 weeks )

B.  6 weeks

6 0
3 years ago
Read 2 more answers
∠WXY and ∠ZXY are adjacent angles. What equation must always be TRUE? m∠WXY=m∠ZXY
Hitman42 [59]

Answer:

m∠WXY+m∠ZXY=m∠WXZ

Step-by-step explanation:

You don't know the angles to be congruent (equal measures), complementary (measures add to 90 deg), or supplementary (measures add to 180 deg); all you know is that they are adjacent, so the sum of the measures of the two smaller angles equals the measure of the larger outer angle.

Answer: m∠WXY+m∠ZXY=m∠WXZ

3 0
3 years ago
The function w(x) = 60x represents the number of words w(x) you can type in x minutes, how many words can you type in 9 minutes
Archy [21]
To solve this, plug in your given x value (9 minutes) in for x in your formula, so w(x)=60(9)=540 words as your answer.
7 0
3 years ago
Read 2 more answers
!15 points!
lina2011 [118]

Sum of complement angles = 90

<L + <M = 90

3x - 15 + x = 90

4x - 15 = 90

4x = 105

x = 26.25


<L = 3(18.5) - 15

<L = 63.75


Answer

<L = 63.75°

5 0
3 years ago
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