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katrin2010 [14]
3 years ago
14

How do you slove this?

Mathematics
1 answer:
Ksivusya [100]3 years ago
5 0
1. a^2 + 7a + 10 = 0                               
    (a + 5)(a + 2) = 0
    a + 5 = 0....a = -5
    a + 2 = 0...a = -2
    solution : (-2,-5)

2. n^2 - 8n + 12 = 0
    (n - 2)(n - 6) = 0
     n - 2 = 0....n = 2
      n - 6 = 0...n = 6
     solution : (2,6)

3. y^2 - 49 = 0
     y^2 = 49
     y = sqrt 49
     y = (+-) 7
     y = 7
     y = -7
    solution : (-7,7)

4. x^2 + 5x - 6 = 0
    (x+ 6)(x - 1) = 0
     x + 6 = 0...x = -6
     x - 1 = 0...x = 1
   solution : (-1,1)

5. u^2 - 7u - 18 = 0
    (u - 9)(u + 2) = 0
    u - 9 = 0...u = 9
    u + 2 = 0....u = -2
    solution : (-2,9)

6. m^2 - 5m = 0
    m(m - 5) = 0
    m = 0
    m - 5 = 0...m = 5
   solution : (0,5)

7. 2t^2 + 5t - 3 = 0
    (2t - 1)(t + 3) = 0
    2t - 1 = 0...2t = 1...t = 1/2
    t + 3 = 0...t = -3
   solution : (1/2,-3)

8. 3w^2 -8w + 4 = 0
    (3w - 2)(w - 2) = 0
   3w - 2 = 0...3w = 2...w = 2/3
   w - 2 = 0....w = 2
   solution : (2/3,2)

9. 2x^2 -3x - 5 = 0
    (2x - 5)(x + 1) = 0
   2x - 5 = 0...2x = 5...x = 5/2
    x + 1 = 0....x = -1
   solution : (5/2,-1)

10. 5v^2 + 29v + 20 = 0
     (5v + 4)(v + 5) = 0
     5v + 4 = 0...5v = -4...v = - 4/5
     v + 5 = 0....v = -5
    solution : (-4/5,-5)

11. 6n^2 - 19n + 15 = 0
     (3n-5)(2n-3)=0
    3n-5 = 0...3n = 5...n = 5/3
    2n - 3 = 0....2n = 3...n = 3/2
    solution : (5/3,3/2)

12. 2k^2 + 7k = 0
      k(2k+7) = 0
      k = 0
      2k+7 = 0...2k = -7...k = -7/2
      solution : (0,-7/2)

13. 3b^2 + b - 10 = 0
      (3b-5)(b+2) = 0
      3b - 5 = 0....3b = 5..b = 5/3
      b + 2 = 0...b = -2
      solution :(5/3,-2)

14. 4y^2 -25 = 0
      4y^2 = 25
      y^2 = 25/4
      y = sqrt 25/4
      y = (+-) 25/4
      y = 2.5
      y = -2.5
   solution : (2.5,-2.5)
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djverab [1.8K]
I am assuming you wrote the problem wrong. Is it a^2?
A^2 -4A-21=0
(A-7)(A+3)=0
A=7 A=-3, ignore the negative number because it doesn't make sense if you plug in for a.
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3 0
3 years ago
The equation's X-y= 2, -2y=-2, X+ y = 2, and x+2y=-2 are shown on the graph below.
ziro4ka [17]

Answer:

A.) x-y=2 and x+2y=-2

Step-by-step explanation:

For option A, we have:

x-y=2

x+2y=-2

Subtract the first equation from the second, to get:

2y--y=-2-2

This implies that:

2y+y=-2-2

Simplify to get:

3y=-4

Divide both sides by 3 to get:

y =  -  \frac{4}{3}  =  - 1.3

We substitute y=-1.3 into the first equation to get:

x--1.3=2

x+1.3=2

x=2-1.3

x=0.7

The solution is (0.7,-1.3), which is approximately (0.7, -1.4)

By inspection, all the other factors have solutions not close to (0.7, -1.4)

3 0
3 years ago
Read 2 more answers
Which Function rule describes the pattern in the table? x:-2,-1,0,1,2 / y:14,11,8,5,2 A) y=3x+8 B) y= -3x-8 C) y=3x-8 D) y=-3x+8
Leona [35]
For every value tht x increases, y decreases by 3

-3x

Then to find the y intercept, look at 0's corresponding value (8)

-3x+8
6 0
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In the event of delinquency, the Buyer may divide any payment not received into not more than three equal installments to be inc
Serjik [45]

Answer:

Option B

Step-by-step explanation:

Given:

As per the contract "Notification of the Buyer’s intent to do so must be made by written letter or phone call to the phone number and address listed below within one business week of delinquency.”

So,buyer needs to only notify the bank about the monthly payments in case of delinquency and not about if payment is going to be late or not.

Option B is correct

Notify the bank if a payment is going to be late !

8 0
3 years ago
What is the distance between the points 1 - 6 + -5 2
Nata [24]
(1, -6) and (-5, 2)

Distance between 1 and -5 = 6
Distance between -6 and 2 = 8

6²+8²=x² (PYTHAGOREAN THEOREM)
36+64=x²
x² = 100
x = 10

Note: Not -10 because <em>distance cannot be negative.</em>
5 0
3 years ago
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