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MatroZZZ [7]
3 years ago
5

GIVING 20 POINTS AND A BRAINLIEST!!!! (Really need help please!)

Mathematics
1 answer:
Murljashka [212]3 years ago
8 0

Answer:

Step-by-step explanation:

General form of quadratic equation:

ax^2+bx+c=0

ax^2+bx=-c

To complete the square, we will divide the coefficient of x in the general quadratic equation as written above and divide by 2

I'm the question;

x^2-20x+13=0

x^2-20x=-13

The coefficient of x =-20

Divide the coefficient by 2 and square the result afterwards

-20/2= - 10

(-10)^2= 100

Add 100 to both sides of the equation

x^2-20x+100=-13+100

x^2-20x+100=87

x^2-10x-10x+100=87

x(x-10)-10(x-10)=87

(x-10)(x-10)=87

(x-10)^2=87

Answer is 10,87

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The future value of a certain money market account with a fixed interest rate of
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Answer:

D = $8637.45

Step-by-step explanation:

Rate = 3.65% = 0.0365

Principal = 5000

Time (t) = 15 years

N = 12 (since its compounded monthly)

Compound interest (A) = P(1 + r/n)^nt

A = 5000(1 + 0.0365 / 12)^15*12

A = 5000(1 + 0.00304)¹⁸⁰

A = 5000(1.00304)¹⁸⁰

A = 5000 * 1.7269

A = 8634.86

The investment would worth $8634.86

Note: the final answer may vary slightly from the answer in the options due to ± from approximation

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3 years ago
Solve for u. 31.25 = u/5
ipn [44]

Answer:

u = 156.25

Step-by-step explanation:

Step 1: Write equation

31.25 = u/5

Step 2: Solve for <em>u</em>

  1. Multiply both sides by 5: 156.25 = u
  2. Rewrite: u = 156.25

Step 3: Check

<em>Plug in u to verify it's a solution.</em>

31.25 = 156.25/5

31.25 = 31.25

3 0
3 years ago
Read 2 more answers
Which graph represents a function with a rate of change of 0.5? On a coordinate plane, a line with negative slope goes through p
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Answer:

C

Step-by-step explanation:

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4 years ago
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Eliminate the parameter. x = t2 + 2, y = t2 - 4
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\bf \begin{cases}&#10;x=t^2+2\implies x-2=t^2\implies \sqrt{x-2}=\boxed{t}\\\\&#10;y=t^2-4\\&#10;----------\\&#10;y=\left( \boxed{\sqrt{x-2}} \right)^2-4\implies y=x-2-4\\\\&#10;y=x-6&#10;\end{cases}

just a plain vanilla substitution

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3 years ago
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Can someone please explain how to do number 9.
bogdanovich [222]

Answer:

x<15, probably

Step-by-step explanation:

maybe multiply 2 to each side to eliminate the fraction. so 3x+15<60. subtract 15 to isolate the variable term so 3x<45. divide by 3 to isolate x so x<15. check the work. is the inequality true for all values of x less than 15? let's try the first possible integer value, 14, to be sure. 3(14)+15= 57. so 57/2<30. now 57/2 is 28.5 and 28.5<30 so it seems right

7 0
3 years ago
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